Certainly! Here’s an engaging and informative article titled:

Why Do Pen Caps Have a Tiny Hole at the Top?

The Small Design That Might Just Save a Life

You’ve probably seen it a thousand times without giving it much thought—a tiny hole at the top of a pen cap. At first glance, it might seem pointless or like a flaw in the manufacturing process. But this small feature isn’t a design mistake or just an aesthetic choice—it actually serves a very important purpose.

So, why do pen caps have that tiny hole? The answer might surprise you.

The Main Reason: Safety

The primary reason pen caps have a hole at the top is to prevent choking.

In 1991, safety regulations began pushing for a change in how everyday items—especially those commonly used by children—were designed. The International Organization for Standardization (ISO) introduced guidelines recommending that pen caps be made with a hole to reduce the risk of suffocation.

Here’s how it works:

If someone accidentally swallows a pen cap—especially children, who often put small objects in their mouths—the hole allows air to pass through, helping to keep the airway open long enough for emergency medical attention. While it won’t prevent choking entirely, it increases the chances of survival by allowing a small amount of airflow.

This simple hole has literally saved lives.

But That’s Not All…

While safety is the top reason, there are a few other practical benefits to the hole in the cap:

✅ Pressure Equalization

Ever had trouble closing a pen cap or pulling one off quickly? That hole allows air to escape when the cap is put on or removed, making it easier to use and preventing the vacuum effect that can make the cap stick.

✅ Prevents Ink Drying (to an extent)