The average person just love to use things without asking questions.
Here are a few things we use everyday with hidden features you might not have noticed but means a lot and serve a lot of purpose.
At a first glance, it might strike you as just a design but it is there for a reason and meant to serve a good purpose. Without the hole, a pen will be completely airtight and as you write and use the ink, the pressure will fall preventing the ink from flowing to the tip and eventually the pen will cease to write although there is still ink in it.
On highlands or in planes where the pressure is lower, a pen with no hole can explode soiling your attire with ink. The hole equalizes the pressure in the pen to allow it to write. So the next time you see it, you should know it is not just there for fun.
You May Like: