When recycling denim, most projects just call for the fabric, which means that other parts—like the zippers, buttons and hems—can end up thrown out. But that doesn't have to be the case. Check out these coasters made from the rolled-up hems of old jeans, as seen on Polka Dot Pineapple. All you need is a few denim hems and some fabric glue, then simply roll them up tight and let them dry. You can even decorate the outer rims with some cute ribboon.