About 100 people choke on pens each year in the U.S. Roughly 100 people choke on pen caps per year in America, which is why BIC adopted their iconic holed caps. The hole not only serves as a design feature, but it makes sure that a person can breathe even if they ingest it.
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The two tiny holes in every BIC pen ensure that the air pressure is the same both inside and outside the pen, which helps the ink flow to the tip.