Why Shopping Carts Have Holes + 15 Things You Never Thought About

Have you ever wondered what that little hole at the top of your sink is for? Or did you know that the majority of hiking backpacks have a secret feature that can literally save your life? Many seemingly plain things you use every day are hiding some unexpected secrets. Shopping carts, for example, have a grid system instead of being solid for a reason. One of them is for the supermarket staff to see what’s in your cart more easily.


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