CounterArt Initially Yours Monogrammed "M" Absorbent Coasters, Set of 4 Set of 4 absorbent coasters with attractive monogrammed "M" design combines artistic form with high function Coasters are natural stoneware with decorative transfer print in white and gold Each coaster has a durable cork backing to protect countertops and furniture; Measures 4 Inch across 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 coaster holders ( sold separately)