Why Pen Caps Have Holes—And Why It Matters
Ever wonder why there’s a tiny hole at the top of pen caps? It’s not just for show—it’s a clever design feature that could save lives and prevent messy leaks.
The hole serves a key safety function: if accidentally swallowed, it allows air to pass through, reducing the risk of choking. It also helps equalize air pressure, especially during flights, preventing ink from leaking.
This small detail is a smart blend of safety, functionality, and design—proof that even the tiniest features can have a big impact.
