Why You Should NEVER Throw This Away - Genius Hidden Use!

Added: 2026-05-24

[00:00:00]Here's how you can protect your bank card from potential [music] fraudsters.

[00:00:04]Use a marker and cover the last four digits.

[00:00:07]You can also use a sticker that's easy to remove and place it over the security code.

[00:00:12]Have you had a house guest that didn't use a coaster? Get a hair dryer and hold it a couple of inches away from the stain. Blow it on medium heat for a couple of minutes to evaporate the water mark.

[00:00:22]If a faded ring remains, mix equal amounts of vinegar and olive oil in a bowl. Wipe it onto the marked area and rub [music] it in until the stain disappears. Then wipe it off.

[00:00:32]Don't waste time scrubbing the burnt stains off the bottom of a pan. Instead, fill it with water [music] and add 3 Tbsp of salt. Let it sit overnight as the salt dissolves the burnt [music] marks. And in the morning, pour the water out of the pan. This way, it will be much easier to scrub all that grease off.

[00:00:49]Picture this. You're on vacation and your shirt has become all crinkled inside the luggage. You need [music] it tonight, but the hotel doesn't have an iron. Don't panic. Hang the shirt up in the bathroom and while you're relaxing a hot shower, the heat and moisture will unwrinkle your shirt. It won't be perfect, but it will get much better without any effort. The football is on and it turns out you've run out of standard batteries. You can use a [music] smaller battery instead that easily fits inside. Now, take some aluminum foil and crunch it up. Fit it [music] into the gap on the negative or flat end of the battery. All done. You can turn on the TV now.

[00:01:26]Once your flip-flops crack and the plug easily slips out of the hole, it's normally a sign that you need a new pair. But there's a way to extend their mileage. Push the plug back through the hole, then take a bread clip and attach it to the end. The clip will provide enough support for the plug to remain in place.

[00:01:43]You've received a package and the receipt [music] is taped on. You've managed to detach it from the box, but how to separate the [music] tape without ripping the paper? Hold both ends of the tape apart and by pulling it slowly, the tape stretches and separates itself from the paper without tearing it apart.

[00:02:01]Ziploc bags are perfect to keep things dry, but it would be great [music] if they were larger. Take two and turn one of them inside out. They can now connect and work as one large bag, big enough to protect a keyboard.

[00:02:15]There's no need to carry your keys in your hand when you go for a jog.

[00:02:18]Instead, [music] put them inside your pocket, take a rubber band, then tie it around the pocket from the inside. This stops the keys from falling out.

[00:02:27]You've broken [music] your key in the door. It's stuck. Great. Arranging for a locksmith could cost up to $100, but for a cheaper [music] and quicker option, try using a hot glue stick. Heat the end with a lighter, and once it's warm enough to melt, push the [music] glue into the keyhole.

[00:02:43]The melted glue will enter the available space covering part of the key. Once it cools, it compresses [music] and gains a strong hold of the key's end. Now, just pull it out.

[00:02:55]If you need to siphon liquid through a hose and want to avoid using your mouth, put one end in the liquid and hold the other upwards with your thumb closing the top. Now, shake up and down. This jiggle motion pushes liquid upwards a little each time. And once it reaches the top, lower the exit [music] point and let gravity do the rest.

[00:03:15]You've left your keys locked inside the car. It's an older model with a roll-down window.

[00:03:19]>> [music] >> You could get the coat hanger and begin the long process of finding the lock, or use duct tape. Make about 20 [music] 2-ft long strands. Stick them onto the window allowing enough room for the tape to grab onto at the bottom. Then with a friend, take the ends of the tape holding them together >> [music] >> and pull downwards. The force will allow the window to lower enough that you can unlock the door.

[00:03:42]While drilling long screws into hardwood, >> [music] >> your old drill might not have enough power leaving them only halfway in.

[00:03:49]Before the drill gives up, get a block of wax and scrape the edges of the screws with it. The wax works like a lubricant, melting as it gets warm, and providing easy entry for the [music] screw.

[00:04:00]You're out camping, but you didn't bring anything to light the barbecue. Take a small plastic bag that won't leak, fill it up with water, and close it tight, making a round bubble. Hold it over where you want to catch the light from the sun. The bag of water will work like a magnifying glass, starting up the barbecue, just as long as it's a sunny day.

[00:04:20]Missing a corkscrew or a cork breaking halfway? By using a stove lighter, heat the top of the bottle. The heat slightly expands the glass, and this forces the cork out the top.

[00:04:31]You've super glued your fingers again.

[00:04:33]Take some salt [music] and pour it on top of your stuck fingers. Put your fingers into the water and slowly rub.

[00:04:39]The mixture will dissolve the glue and release you in no time.

[00:04:43]While hanging up a painting, it can be impossible to find that stubborn nail.

[00:04:48]Place a fork upside down, and insert it so the nail is in between the middle fork teeth.

[00:04:53]The fork has provided a long arm that's separated from the wall, making it easier to slip the string of the painting over the nail. Once it's [music] perfectly balanced, simply remove the fork.

[00:05:06]You need to put a cake into a container, [music] but taking it out again later by lifting it up from the inside might ruin the cake. Put the lid upside down, and place the cake on the lid. The base of the container is now the lid, making it much easier to access, slice by slice.

[00:05:23]>> [music] >> Pour out water more efficiently from large jugs and bottles by swirling. This will make the liquid inside spin, creating a vortex. The vortex [music] allows for the air to flow back into the bottle as the water pours out, much faster than the glugging alternative.

[00:05:41]There's an easier and less messy way to remove eggshells from a boiled egg.

[00:05:45][music] Once fully boiled, crack the shell on both ends by tapping them. On one end, pinch off the shell. Use the open end to blow with your mouth. The force [music] of air will push the flesh and expand the eggshell, forcing out the egg undamaged.

[00:06:01]When the hinges of your laptop break, [music] repairing them can cost up to $300.

[00:06:06]A far cheaper fix is to buy a picture frame and tape it to the back of the screen.

[00:06:12]You've dropped a small piece of jewelry on the floor, seemingly [music] impossible to find. Take a stocking and place it over the end of the vacuum hose. Give the area a good vacuum and check the end periodically.

[00:06:23]>> [music] >> You will eventually find it sitting at the end.

[00:06:27]You've drilled a hole in the wall, but the drill hole is now too wide. Remove the screw and find an object that is slightly shorter and thinner.

[00:06:34]>> [music] >> Pieces of plastic, small wires, paper clips, or even toothpicks are perfect.

[00:06:40]Place whichever item you find inside the hole. It's filled the gap enough so the screw will [music] now re-enter securely.

[00:06:47]Taking the trash out can put you in a gross scenario of getting bin juice on you. A great way to avoid this is by placing old papers at the bottom of the bag. Now, >> [music] >> not only does it absorb all the liquids from the food and other sources, but also helps prevent bad smells from forming within [music] a bin.

[00:07:04]Nobody likes mosquitoes, and pesticides are pricey. A cheap alternative [music] is to take a plastic bottle and cut the top part off from the bottom of the funnel. After removing [music] it, turn it upside down and put it inside the bottle. Mix two cups of warm water with two tablespoons [music] of sugar. The mosquitoes will be attracted to the formula inside and become trapped. Now, just sit back and relax without getting bitten.

[00:07:32]What's hiding inside Coca-Cola cans and regular household batteries? Why do magnets affect breakfast cereals?

[00:07:40]Do crosswalk buttons actually work, Or are they just useless decorations?

[00:07:45]What does that USB [music] symbol really mean?

[00:07:49]I'm not sure I know the answers to these and similar questions, but I'm eager to learn the truth together with you. Let's find it out.

[00:07:58]Coca-Cola cans have a secret few people know about.

[00:08:02]Here's a Coke can. Let's submerge it in a highly corrosive alkaline solution.

[00:08:07]The aluminum dissolves due to a process known as hydrolysis, and we can see a plastic liner inside the can.

[00:08:14]It's made from a polymer or epoxy resin and serves as some kind of a protective barrier between the aluminum walls of the can and the rather acidic soda.

[00:08:25]Despite a popular myth, household batteries don't actually contain liquid.

[00:08:29]And if you accidentally cut them open, no toxic liquid will spill.

[00:08:33]Most of them are dry cell batteries, which are made of electrochemical cells.

[00:08:37]Those convert chemical energy into electrical energy.

[00:08:41]Larger batteries often house numerous small cells within them, too. Even Tesla vehicle batteries consist of multiple small cells.

[00:08:50]When combined, they easily provide the necessary voltage.

[00:08:55]Most toothbrushes have differently colored bristles, but they aren't just pleasing to the eye.

[00:09:00]Those bristles, often blue, [music] have a functional purpose.

[00:09:04]They're called toothbrush indicators, and their colors fade as you use the brush.

[00:09:08]The American Dental Association recommends changing your toothbrush at least four times a year.

[00:09:14]And by getting paler, these bristles help you figure out when it's time to replace your toothbrush.

[00:09:20]You'll probably agree that there's no better snack than a pack of chips.

[00:09:24]Some are flat, others have ridges. Is it just aesthetics?

[00:09:29]Not really.

[00:09:30]The main purpose of those lines on some kinds of chips is to help with the distribution of spices and seasonings.

[00:09:36]In other words, all those substances that make your chips taste like cheese are mostly stored inside the lines.

[00:09:42]Plus, the lines make chips crunchier.

[00:09:46]Now, this one might be a surprise, but some breakfast cereals are magnetic.

[00:09:51]That's because they're often fortified with iron in the form of a fine powder.

[00:09:56]Due to the added iron, cereal flakes get attracted to magnets. While this may sound kind of alarming, but in reality, the iron content in the flakes is minimal and doesn't pose any threat to your health.

[00:10:08]That clear fluid in gel pens is called the ink follower or stopper fluid.

[00:10:13]The gel in such pens contains pigment particles dissolved in a polymer solution.

[00:10:18]The main task of the stopper fluid is to be a barrier to prevent the gel from evaporating or leaking out.

[00:10:24]Without this transparent fluid, your gel pen wouldn't function.

[00:10:29]The fluid always stays in one position and doesn't get dissolved with the gel.

[00:10:33]Neither does it move backwards or flow out of the pen.

[00:10:39]Many pedestrian crosswalk buttons, namely in New York, are placebo buttons.

[00:10:44]They do literally nothing when you press them.

[00:10:47]Originally, they were functional after being introduced in 1964, but today most of them don't affect traffic lights, which are programmed based on the real needs of the traffic flow.

[00:10:57]Why do such buttons even exist then?

[00:11:00]It's a simple psychological trick providing you with an illusion of control.

[00:11:06]You might have noticed that movie theater seats are almost always red.

[00:11:10]This choice isn't random. It has strategic importance, which is [music] rooted in visual science.

[00:11:16]The thing is, red light has a longer wavelength.

[00:11:19]It means that it's the first color to disappear in low light. It allows the audience to concentrate better on the screen once the movie begins.

[00:11:26]>> [music] >> Such a design choice enhances the viewing experience by minimizing distractions.

[00:11:32]Speed bumps are crucial for pedestrian safety, >> [music] >> but at the same time, they can seriously increase car emissions due to the non-stop acceleration and deceleration they cause.

[00:11:44]To address this issue, some cities like London are testing fake speed bumps.

[00:11:49]Those are optical illusions painted on the road.

[00:11:52]They look raised from a driver's perspective, but [music] in reality, they're flat.

[00:11:57]Authorities hope that this approach will slow down drivers without having a negative impact on the environment.

[00:12:04]Soda bottles are always filled in such a way that there's some space between the liquid and the cap.

[00:12:10]That's because soda contains carbon dioxide. It's a gas that can expand [music] once the bottle's heated. If there's no gap in the bottle, it can break because of the pressure building inside.

[00:12:21]Also, when you open your drink, the gases go out in the form of bubbles, making the drink overflow.

[00:12:27]The gap helps [music] with this problem, too.

[00:12:31]The USB symbol, looking like a trident, has always sparked multiple speculations about its origin.

[00:12:39]One popular idea is that it represents Neptune's trident and symbolizes power and adaptability. But, there's also a little bit less exciting theory.

[00:12:48]A man who claimed to have designed the symbol in the 1980s stated that it was supposed to represent connectivity.

[00:12:55]The large circle symbolizes a computer, while the attached shapes, the circle, the triangle, and square, stand for different outputs.

[00:13:05]The design of a tennis racket has a specific feature known as the throat.

[00:13:09]It's an open space below the head of the racket.

[00:13:13]This space isn't just for storing balls.

[00:13:15]It also improves the racket's aerodynamics by letting air pass through.

[00:13:19]It seriously reduces drag during swings.

[00:13:24]Speaking of tennis, tennis courts are usually built with a north-south orientation.

[00:13:29]It helps minimize the impact of the sun's position during the game, ensuring that neither player has the sun directly in their eyes.

[00:13:38]Look closely at a tram's overhead lines and you'll see that its contact wires zigzag back and forth instead of going in a straight line.

[00:13:46]That's because all trams have pantographs attached to their roofs.

[00:13:51]The upper part of the pantograph is gradually worn down by the overhead wire and eventually needs to be replaced.

[00:13:58]To wear it down evenly, the wire is not installed strictly along the tram's path, but in zigzag patterns.

[00:14:05]As the tram moves, the pantograph slides along the wire and it wears down evenly.

[00:14:12]Those cone-shaped water cooler cups, their shape is intentionally designed to prevent users from setting the cups down.

[00:14:20]>> [music] >> This allows employees to minimize the risk of spilling water on their desks around various electronics devices.

[00:14:26]Plus, less material is used to produce cone-shaped cups, which makes the process less wasteful and more cost-effective.

[00:14:34]It also kind of supports sustainability by encouraging people to drink their water quickly and dispose of their cups immediately after.

[00:14:43]Most suitcases have two zipper pulls >> [music] >> and it serves several purposes.

[00:14:48]First of all, if one zipper fails, the other can keep the suitcase closed.

[00:14:54]Even better, having two zippers allows you to have easier access [music] to small sections of your suitcase without having to open it entirely.

[00:15:02]And finally, when you have two zippers, you can connect them with a padlock for increased security.

[00:15:10]Some plastic milk containers have dents on their [music] sides. These dents serve several purposes.

[00:15:16]When milk spoils, it usually causes swelling and high pressure or inside the container.

[00:15:21]>> [music] >> That's when the dent pops out and doesn't let the jug blow up.

[00:15:25]Plus, >> [music] >> if you decide to freeze the milk, it will expand like any other fluid.

[00:15:31]And then again, the indentation will pop out and prevent the container from breaking inside your freezer. [music] If you ever had a problem figuring out why fake pockets exist, you need to hear this.

[00:15:45]The main reason is that if a clothing item has a specific cut or shape, pockets may spoil it.

[00:15:51]They can alter the item's shape either in the warehouse or already on the retail rack. The solution?

[00:15:57]Getting rid of the pockets in key areas.

[00:16:00]Plus, fake pockets are obviously cheaper, and they don't get stretched out.

[00:16:06]The Thermos wasn't actually invented to keep your coffee warm.

[00:16:10]It was made by a Scottish scientist who wanted a safe place to keep his chemicals at a stable temperature.

[00:16:17]So, he took two bottles, put the smaller one inside the bigger bottle, and vacuumed out the air between them.

[00:16:27]You must have [music] noticed those lines on some kinds of chips. For one thing, they help with the distribution [music] of spices and seasonings. In other words, all those substances that make your [music] chips taste like cheese are mostly stored inside the lines.

[00:16:43]Plus, the lines make [music] chips crunchier.

[00:16:47]Some cars have a tiny coffee cup sign on their dashboard. It's the vehicle's anti-drowsiness mechanism.

[00:16:54]There are [music] manufacturers that equip their cars with a drowsiness detection system.

[00:17:00]It analyzes the speed, wheel angle, and lane deviations [music] to figure out if it's time for the driver to take a break.

[00:17:07]If it is, the vehicle makes several audio [music] signals, and the coffee cup sign starts to flash.

[00:17:15]Some plastic [music] milk containers have dents on their sides. These dents serve several purposes.

[00:17:22]For one thing, when milk spoils, [music] this process usually causes swelling and high pressure build-up inside the container. That's when the dent [music] comes in handy. It pops out and doesn't let the jug blow up.

[00:17:36]Plus, if you decide to freeze [music] the milk, it will expand like any other liquid. And then again, the indentation [music] will pop out and prevent the container from breaking inside your freezer.

[00:17:49]You might have wondered [music] why jerrycans have three handles. It's a clever designer move.

[00:17:56]This way, if you carry the container [music] alone, you can use only the central handle to distribute the weight evenly. [music] But, if your friend wants to help you out, each of you can grab the side handle.

[00:18:10]The first [music] jeans had a problem.

[00:18:12]Workers and miners, who were the original jeans wearers, put too much pressure [music] on the poor piece of clothing.

[00:18:19]As a result, the seams couldn't withstand the stress and tore.

[00:18:24]Tiny metal studs were invented [music] to prevent this from happening.

[00:18:29]Sticky notes come off relatively [music] easily because their adhesive is spread out across the paper unevenly in small blobs.

[00:18:37]And only [music] some of these blobs touch the surface of whatever you've stuck the note on.

[00:18:42]That's [music] why when you unstick a Post-it and attach it to something else, it still works until all the glue gets used or covered with dirt.

[00:18:52]Soda bottles are always filled in such a way that there's some [music] space between the liquid and the cap.

[00:18:59]That's because soda contains [music] carbon dioxide.

[00:19:02]It's a gas that can expand once a bottle is heated. If there's no gap in the bottle, it can break because of the pressure building inside.

[00:19:12]Also, [music] when you open your drink, the gases go out in the form of bubbles, and the drink is likely to overflow. The gap helps with this problem, too.

[00:19:21][music] Dental floss is super useful for your teeth, but it might be [music] rather hard to operate. It regularly slips out of your fingers and tangles.

[00:19:33]To avoid these problems, tear off [music] a piece of dental floss and tie its two ends together. It'll be much easier to use and won't hurt your fingers.

[00:19:44]Now, about those horizontal lines [music] on plastic bottles.

[00:19:48]They help hold bottles up.

[00:19:51]Some bottles are produced from soft plastic. Without the lines, they wouldn't keep their shape.

[00:19:57]Instead, they would twist easily or even break.

[00:20:02]The soft round part [music] under a soda bottle cap keeps the carbonation from escaping.

[00:20:08]Without it, [music] your pop would go flat in no time, probably even before you buy it.

[00:20:15]If you don't [music] have anywhere to put a toothpick after using it, break off its flat end at the first groove and place it on [music] the table. Now, you can balance the used portion of your toothpick on the grooved part so that it doesn't have to touch the table.

[00:20:32]You can also make a makeshift stand for disposable chopsticks. They have a sort of lump [music] on one side. Break that lump off before you split the pair.

[00:20:42]Now, when you want to take a sushi break, just place the stick on this stand.

[00:20:50]Donuts are shaped like rings because otherwise, they might get overdone at the edges, but uncooked [music] and gooey inside.

[00:20:58]With a hole in the center, both the outside and the inside get ready at the same time.

[00:21:05]Ever notice that layer of [music] clear fluid in gel pens? It's called the ink follower or stopper fluid.

[00:21:13]The gel in such pens contains pigment particles dissolved [music] in a polymer solution.

[00:21:20]The gel should be thick enough to keep the pigment particles suspended, but also thin enough to flow first onto the ball and then the paper. [music] The main task of the stopper fluid is to be a barrier to prevent the gel from evaporating or leaking out. Without this transparent fluid, your gel pen wouldn't function.

[00:21:41]The fluid always stays in one position and doesn't get dissolved with the gel.

[00:21:45]Neither does it move backward or flow out of the pen.

[00:21:50]Some button-down [music] shirts have a button hidden on the back of the collar.

[00:21:55]Its main [music] purpose is to prevent the tie from sticking out from under the collar.

[00:22:01]As for that locker [music] loop on the back, you can use it to hang the shirt on a hook to avoid wrinkling [music] it.

[00:22:10]Outer rings in zipper sliders, especially when two sliders [music] are used together, are added so that you can connect them with a lock and keep sticky fingers away.

[00:22:21]Most ambulance cars have this word printed on the front of the vehicle.

[00:22:26]That's the word ambulance backward.

[00:22:29]It's written in reverse so that the driver in front of the ambulance can see the word properly in their rearview mirror.

[00:22:37]Then they can move out of the way and let the ambulance pass.

[00:22:42]Escalator brushes serve an important safety purpose.

[00:22:46]You might have heard that most accidents happen after people get their bags or clothes stuck in escalators because they stand too close to the sides.

[00:22:55]But when there are nylon brushes [music] on both sides, you can't but keep your feet away from the escalator skirt panels. The result? No [music] accidents.

[00:23:05]The side holes in sneakers are for [music] laces.

[00:23:09]Since sneakers were originally invented for basketball [music] players, this interesting design allowed them to accommodate any player's foot.

[00:23:18]They just needed to lace their sneakers in the most comfortable way for them.

[00:23:23]The holes in the bottoms of your earphones allow air to [music] circulate up and through the speakers.

[00:23:29]It helps to increase low frequencies, making the bass sound deeper. The quality of [music] the sound also becomes much better.

[00:23:38]Ever been stranded [music] with a cup of applesauce, but no spoon at hand?

[00:23:43]But each snack pack already has a built-in [music] spoon.

[00:23:47]Several twists of the foil lid, and here you go.

[00:23:53]Diamond slits on backpacks [music] were originally placed only on traveler bags.

[00:23:58]Their purpose was to carry [music] ropes.

[00:24:01]These days, you can find such slits on almost every backpack. Why not use them to carry a bottle of water, an umbrella, [music] or a pair of sneakers?

[00:24:12]Highlighters are filled with a special semi-transparent fluorescent ink that can glow in dim light.

[00:24:19]Yellow and light green hues are the most [music] popular because they don't prevent you from seeing the text after black and white photocopying.

[00:24:28]Photocopiers perceive [music] yellow and light green marks as almost non-existent and don't print them.

[00:24:36]A stop sign has an octagonal [music] shape to help drivers recognize it easily, even if they see it from the back. When the signs weren't reflective yet, this shape prevented drivers from confusing the stop sign with any other at night.

[00:24:51]>> [music] >> The number 57 on a Heinz ketchup bottle has nothing to do with the product label.

[00:24:57]The truth is that the place with the numbers [music] is the very sweet spot you should tap to get the ketchup flowing.

[00:25:05]So, stop hitting the bottom of your sauce bottle and hit 57.

[00:25:11]Lots of private houses have triangular shaped roofs because this allows rain, snow, and fallen leaves to slide off the slope.

[00:25:20]If all this stuff piled up on top of your house, one day your roof would collapse.

[00:25:27]Airplane windows have rounded edges, and that's a crucial [music] safety measure.

[00:25:31]It prevents aircraft accidents.

[00:25:34]Weak spots are usually situated in the corners.

[00:25:38]If airplane windows were square or rectangular, [music] each of them would have four potential weak spots. Under pressure, they would collapse.

[00:25:49]Have you ever wondered what these extra holes at the top of your running shoes [music] are for?

[00:25:53]They're designed so that you can tie the shoes in multiple different ways. That's useful [music] when you want to compensate for things such as a bad stride or even a damaged toe.

[00:26:04]Plus, [music] you can change the look of your shoes the way you prefer.

[00:26:10]Many people use a [music] dust jacket of their book as a book marker. No problem with that. It will save your book from bent page corners. But the primary purpose of a dust [music] cover is to keep the book safe from distortions. For instance, if you spill juice or drop some of the food on your book while reading it.

[00:26:29]The Tic Tac dispenser has this little groove on its top so you can dispense only one Tic Tac at a time. Even though, [music] let's be honest here, nobody does that. Most of us just spill a whole bunch at once and then we wiggle all those extra Tic Tacs back in.

[00:26:46]Those rubber bumps you see between the tire [music] treads are there for your safety. The raised edges tell you what the minimum height of your tread is.

[00:26:54]If the bump and the [music] edges are even, it's time for you to visit the tire shop as soon as possible. But if the bumps [music] are well beneath the level of the edges, you're good to go.

[00:27:06]What about that black grating on the microwave window? It's something called [music] a Faraday shield.

[00:27:12]And it's there to prevent microwaves from getting away and turning the entire room into a Faraday cage.

[00:27:18]If the microwaves escape, your meal won't cook properly, either.

[00:27:22]So, yep, the cage is not there to make it difficult for you to see your meal while it's cooking.

[00:27:26]>> [music] >> It's keeping the electromagnetic energy inside.

[00:27:32]How about a wrench compatible screwdriver?

[00:27:34]Cover your screwdriver with the end of your wrench and you can increase its torque.

[00:27:38]That's why the head of your screwdriver is designed the way it is.

[00:27:42]When you have odd angles, you can use this strategy.

[00:27:47]You've probably heard those myths, >> [music] >> the blue side of the eraser can erase the pen. False. Its purpose is [music] to erase a pencil. But in case you're writing something on heavier paper, the blue side can remove smudges you see after using the pink eraser, too.

[00:28:04]Have you [music] ever wondered why oranges in supermarkets mostly come in the red mesh bag?

[00:28:10]It's a trick [music] to make this food look more orange and encourage you to make a purchase.

[00:28:14]An extra tip, don't [music] throw away the mesh bag. Tie it up so you can have a small pot scrubber to clean your sink, kitchen appliances, and dishes.

[00:28:26]You can see golf balls don't have a perfectly round shape.

[00:28:29]Their surface is covered with many little dimples, something golf balls didn't always have.

[00:28:34]At one point, [music] experienced golfers started noticing how through time older balls with imperfections, such as nicks and bumps, could travel further.

[00:28:45]Such things create turbulence in the air around the golf ball, which eventually reduces drag. So, manufacturers started producing balls with dimples [music] so they could go farther and faster.

[00:28:59]You might have noticed that sometimes there are ridges in toothpick [music] tops. It's more hygienic because when you break that off, you can prop the toothpick up on it and it won't touch anything.

[00:29:11]Another safety feature you'll find, this time in your car, is a tab [music] on your rearview mirror.

[00:29:17]With it, you can change the position of the mirror so you don't get blinded if there's a car behind [music] you with its high beams on.

[00:29:24]So, this little tab helps you control the glare of lights coming from behind.

[00:29:28]This feature showed up in the 1930s, but in the early 1970s, it became a part of standard equipment in most trucks and cars.

[00:29:38]Do you see that tiny hole on your iPhone right next to the rear-facing camera?

[00:29:43]It's a microphone. And it's there so your phone can record sound as you turn your camera around.

[00:29:51]Some cables have a thick cylinder towards the end of the cord. It's called a ferrite [music] core or a choke.

[00:29:58]It's a magnetic iron oxide that stops high-frequency electromagnetic interference.

[00:30:03]For example, you know that annoying static noise you get if you bring your phone too close to a speaker?

[00:30:09]This interrupts your call, which is why cable cords with big cylinders are pretty useful because they prevent these things.

[00:30:18]Do you know why nearly all luggage bags and backpacks have two zippers?

[00:30:22]It's way more [music] convenient and easier to open in that way.

[00:30:26]But not just that, you can also lock these two zippers together to keep the stuff inside your bags safer. [music] You know how toilets at public spots like malls have those big gaps at the bottom?

[00:30:39]It's primarily for better circulation of air.

[00:30:42]This type of door also makes it easier to clean the toilet [music] or check if it's occupied if you're standing in line.

[00:30:49]Other than that, if you get stuck there [music] and the lock gets broken, you still have a way to escape. You can just crawl out.

[00:30:58]Ever notice those plastic end caps on utility knives?

[00:31:02]And they also have scales on them, which indicates [music] you may use them multiple times, but with sharp edges.

[00:31:10]You can separate the blades through these plastic end caps. Then, you can move the slider and bring the sharp blade to the front. [music] If you've ever taken a moment to examine a regular grocery cart, >> [music] >> especially their fold-out section, you probably notice those metal loops jutting out.

[00:31:27]They're designed to protect the items you carry in your cart.

[00:31:31]You can use them to hang bags with soft items you don't [music] want to accidentally squish with heavier products like bread or easily breakable things like eggs.

[00:31:43]Many coffee mugs come with curved notches [music] on their bottom. When you're washing your mugs, put them against the rack at an angle in your dishwasher. This way, >> [music] >> the water won't pool in there, so your favorite cup will be completely dry by the time you take it out of the dishwasher.

[00:31:59]If you're a McFlurry fan, you've probably noticed [music] there's a square hole in the handle of the spoon.

[00:32:05]It's there so you can attach it to the special machine that mixes the ice cream and your favorite toppings together.

[00:32:12]The machine has a bar that [music] slips into this square-shaped spoon and then thoroughly stirs it.

[00:32:17]And you get the spoon so they can minimize the mess during the process.

[00:32:22]>> [music] >> Quite neat, wouldn't you say?

[00:32:25]A regular milk jug has a dent on one side.

[00:32:29]Some might see it as a random design decision, but a dent [music] has several purposes.

[00:32:34]One of them is to get bigger if there's a gas build-up.

[00:32:38]This happens when your milk is spoiled.

[00:32:40]So, you don't even have to try to check this out. Also, the dent is there so the jug doesn't burst if you accidentally drop it. The dent allows the expansion space that deals with the sudden pressure that happens when you drop the jug.

[00:32:55]Dental floss.

[00:32:56]>> [music] >> Sure, it's important for your dental health and it's easy to assume what you do with it.

[00:33:01]>> [music] >> But, dental floss is great in the kitchen as well because it's a very precise cake slicer, way better [music] than a regular knife.

[00:33:12]Most kitchen shears have a serrated opening right there at the center [music] where the blades and handles meet.

[00:33:18]It's something you can use to trim difficult herbs such as rosemary, [music] thyme, or chives.

[00:33:24]Because of this opening, you don't need to pick the leaves off by hand but de-stem them in one motion.

[00:33:31]The majority [music] of gelatin containers or single-serving yogurts come with a tin foil lid. And in most cases, you can use this covering as a disposable spoon.

[00:33:41]Just peel away the covering and after a couple of simple folds, you'll have a perfect little spoon for your midday snack.