Video narration
Ever noticed the tiny hole in many pen caps? It’s not decoration—it’s a safety feature. If a cap is accidentally swallowed or inhaled, that hole can let a small amount of air pass through, lowering the risk of choking until help arrives. That’s why you’ll often see similar holes on marker caps, too. Here’s the lesser-known part: in many countries, safety standards actually encourage “vented” caps—caps designed to allow airflow if they get stuck in a child’s airway. Manufacturers test for this, because a cap without any vent can form a tight seal. So the next time you spot that little dot, remember: it’s a tiny, intentional escape route for air, not just a style choice.