Ever wonder why pen caps have a hole on the top?

posted by Jason Taylor -

Those holes on top of some pen caps? They’re not there to let your pen ink “breathe”, they’re there to let US breathe.

Should someone accidentally swallow a pen cap, this hole allows air to go through your windpipe until someone can hopefully help you out.

Pretty interesting. That’s a good reason to stop chewing on pen caps if we’ve ever heard one.

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Jason Taylor

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