10 Hidden Uses Built Into Ordinary Objects That You Probably Never Knew About

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You probably think that you already know everything there is to know about the most common items you encounter and use every day. So it may come as a surprise to find out that there are plenty of ordinary objects that have hidden features. Some of them are pretty exciting.

Here is a list of 10 things that can serve some pretty intriguing functions. You will find some of them curious, and others may just leave you dumbfounded.

1. The Hole at the Top of Your Pen Cap

Have you ever noticed that most of your pens include a little hole at the top of the pen cap?