Everyday Things You Never Knew Even Had A Purpose

A lot of people think the hole in the cap of a ballpoint pen is there to keep the pen from drying out, or that it's there to keep a pressure balance that prevents the pen from leaking. The real reason it's there is much more straightforward: It's there to lower the risk of suffocation. If a small child was chewing on the cap and choked on it, the hole keeps their airway from closing up entirely.