CounterArt Spooky Hollow Absorbent Coaster, Set of 4 Set of 4 absorbent coasters with attractive holiday design combines artistic form with high function Coasters are natural stoneware with decorative transfer print Each coaster has a durable cork backing to protect countertops and furniture To remove stains, soak coaster in 1 part household bleach and 3 parts water until stain lifts, then rinse and air dry Holders available; Look for CounterArt wood coaster holds sold separately