What is the small hole in the cap of the BIC pen used for? It can save your life

We have been using the BIC pen since childhood. He has always been present in our daily lives: he accompanied us in our school career, followed us even to the office and is always hiding somewhere at home. But, are we sure to know all the secrets? Do you know in particular why the brand has voluntarily integrated this hole on the cap of its ballpoint pens? If you are curious to find out, we are now going to lift the veil on this mystery and reveal to you the true function of this orifice.