Coasters. They're fabulous. Grab some pretty 12x12 scrapbook paper, four 16 sq in tiles (Home Depot, Lowes, etc; four usually cost less than a dollar) some Modge Podge, some felt, a hot glue gun, and aerosol sealer (clear). Cut the paper and Modge Podge it onto the tiles. Let it dry. Then seal it with the clear sealer. Then hot glue gun the felt to the bottom! It takes about an hour. I've done this twice and both times they have come out amazing!