The cap is an essential and integral part of any fountain pen. Its function is to protect the tip and the cartridge from possible damage and to provide a simple and effective means of confining the ink that can accumulate around the pen at the base of the section. This prevents ink from staining everything that touches the tip. Other pen manufacturers have followed suit and have also added larger holes in the top of their pens, he added.
Bic may have been the first to implement the hole for the pen cap, but since then other pen manufacturers have adopted the safety measure according to the International Organization for Standardization (ISO), an independent organization that sets product standards for 164 countries. The specifications include the condition that the pen caps are ventilated with an opening that allows a person who drowns with the cap of a pen to maintain somewhat regular respiratory function until medical help arrives. Open a new box of Bic's famous Cristal pens and you'll find yourself face to face with a bunch of pen caps with holes in them.