There are things you use every day but do not necessarily know its true purpose.
Button on seat belt
The little button at the end of your seat belt doesn’t seem to be in the right place. In fact, it’s there to make sure your key will always be at the end. So you won’t have to mess around with your seat belt every time you fasten it.
The button on the seat belt of a car has a use that few people know.
Door knob
You use doorknobs every day, so you should be concerned about how many germs can get on them. However, they made brass door handles partly for that reason. Brass provides an antibacterial effect, eliminating the microorganisms that are starting to settle on your doorknobs.
Rivets on jeans
Maybe you mistook the little studs on your jeans for a decorative detail. In fact, they are extremely important. These nails provide extra support for tear-prone areas with greater strength.
Hiking shoes
Hiking and crossing the snow require the best footwear. The perfect shoes for this also have an extra eyelet to thread the laces through. Looping your laces over the extra eyelets will give more support to your ankles and feet, and will also provide more stability as you walk.
Lock
Ever wondered how long that lock can last outside, in rainy weather, to keep your property safe? It has a small hole at the bottom. It’s there to drain water to avoid internal corrosion. It also serves to let the oil, further prolonging its shelf life.
F and J . keys
You may not have noticed that the F and J keys have a small ridge at the bottom. They are there to help you find your exact starting position with your fingers on the keyboard without having to look down.
Hole in the bottom of an airplane window
If you are lucky enough to sit by the window on an airplane, you will notice the small hole in the bottom of the window. It helps to reduce the air pressure on the plane. The windows themselves are made from acrylic and aren’t really glass, which keeps the windows fog-free, so you can see the scenery on your journey.
The windows on airplanes were originally square. However, they will constantly fracture due to the constantly changing pressure. The round window can evenly distribute the pressure, ensuring you will have a comfortable journey.
Hole in the pen cap
The pen cap has a hole at the end. It’s not there to help your pen boost performance, but it’s there to help you breathe. In case you are sitting in class or at work, you are chewing on the cap and accidentally swallowed it, you can rest assured if it gets stuck.
Straw
When you are traveling by car or any other form of ground transportation and you are trying to drink your favorite soft drink through a straw, sometimes you will find it quite difficult to do so. Simply turn the can cap around so your straw fits easily inside, making it easier to drink.
Tab on the rearview mirror
It’s hard to see at night while driving, but it’s even worse when the driver behind you shines their headlights. Your rearview mirror has a tab at the bottom.
When you press it, it will change the angle. One is for daytime driving, the other is for night driving. It will come in handy in case a driver behind you forgets to turn off the headlights.
see more
Sunshine (According to Trademark and Law)
