In Your Pocket
It would be hard to imagine anyone in the USA not having one of these items in their pocket at some time in their lifetime. This item is formed by compression of a common material used throughout the USA for a multitude of purposes. Look closely you can see the deformed/flattened structures as you explore the specimen. Try to guess what it is as you decrease the magnfication. How low of a magnification must you go before you figure out what it is?