Here are some coaster that I made using regular ceramic tiles. I used Black Stazs-on ink for the back ground and orange Stazs-on for the letters. You do NOT have to put these in the oven as long as you use Stazs-on ink, I have put them to the test with a bowl of water and the ink does NOT run. I since have made all different ones. These are a great and inexpensive gift (set of 4) Dont forget to put some little cushions on the bottom so they dont scratch the furniture. Also dont buy the tiles that are slick. Good Luck and have fun.