Item parts you never know are useful

Tiny holes atop Pen Caps

Yea, they have a purpose than covering the pen tip. This tiny hole lying fallow atop our pen caps are there for a reason. While we practically use them to get rid of boredom by blowing it like a whistle, the hole is made to allow air to pass through it in case a child swallows it. It will, therefore, reduce suffocation.