That small hole you’re referring to often appears in different everyday items—and surprisingly, each one has a specific and useful function. Here are a few examples of “mystery holes” and their purposes:
1. Pen Caps 🖊️
That tiny hole in the top of most pen caps isn’t for ink flow—it’s actually a safety feature. If someone accidentally swallows the cap, the hole helps air pass through and reduces the risk of choking.
2. Smartphones (Tiny Hole on Top or Side) 📱
This is usually a microphone used for noise cancellation or voice recording. It helps improve call quality by filtering out background noise.
3. Airplane Windows ✈️
Ever noticed a small hole in the lower part of the window? It’s called a bleed hole, and it helps regulate cabin pressure and prevents the window from fogging up or cracking due to pressure differences.
4. Locks (Tiny Hole at the Bottom) 🔒
That little hole in padlocks serves two purposes:
- It allows water to drain out to prevent rust.
- It can also be used to lubricate the lock mechanism with oil.
5. Sink and Bathtub (Overflow Hole) 🚿
This small hole near the top is a safety feature. It stops your sink or tub from overflowing by providing an alternate route for water to escape.
So, next time you spot a tiny hole in something, know that it’s probably not a design flaw—it’s a hidden helper with a specific job!
