12. That Tiny Hole in the Top of Your Pen Cap Is There to Save Lives
Most ballpoint pens have a small hole in the cap, something you’ve seen thousands of times but never questioned. It’s a safety feature: if a child (or anyone) accidentally swallows the cap, the hole allows air to pass through so they can still breathe while waiting for help. It’s been standard on many brands since the 1990s.
Over-35 parents who’ve watched kids chew on everything suddenly realize how many near-misses they never noticed. It turns a simple pen into quiet lifesaving design — proof that the most obvious safety tricks hide in the objects we use daily.
