Have you noticed the small hole at the top of pen caps? I’ve always wondered why they are there. I thought the holes were pretty useless and might affect the ink in the pen, but now I know better.
The hole is actually there to protect the ball and the point of the pen. It equalizes the pressure in the pen to prevent the ink from leaking out. But the most important reason for the existence of the hole is to prevent chocking if people ever swallowed it! The hole will allow the person to continue breathing for a short period of time, but that short time can make a difference between life and death. BIC was the first company to revolutionize this trend.
According to Business Insider UK, the majority of the population that swallowed certain parts of a pen occur between children ages 6-15 years old; and between 2000 and 2010, more than 10,000 swallowing cases were reported.
Source: Business Insider UK