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. #brightside Animation is created by Bright Side.
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