We currently have three different “kinds” of coasters in our home. Notice how I didn’t say “sets”? Coasters in my house tend to wander off, never to be seen again. I believe they’ve started a commune somewhere with all of the socks that never emerge from the dryer. We definitely needed some coasters.
I found some cute scrapbook paper and bought some cheap ($0.16 each) white ceramic tiles at Home Depot. I adhered pieces of my scrapbook paper to the tile with Mod Podge. Then I brushed another coat on top. When they were dry, I sprayed them with a couple coats of clear acrylic sealer.
I cut out pieces of adhesive backed cork for the backside. Easy peasy.