Why Pen Lids or Caps Have Holes? You Can Never Guess.
Published on November 13, 2016 , under Secrets & Hidden Facts
There are many things which we see and use everyday, but never pay attention or care to find reasons why these things are designed in certain ways, pen lids or caps are one of them. We all use ball ink pens and noticed that there lids have a hole. There is an important reason for Read More…