NCAA Virginia Tech Absorbent Coaster Gift Set NCAA licensed absorbent coasters with wood coaster holder Coasters are made our of ceramic bisque, a naturally absorbent material and have a cork back to prevent scratches to fine surfaces Hokie Bird is the feature logo on these Collegiate coasters Simply soak your coasters in hot water with a liquid detergent, rinse and let air dry We will fully replace your NCAA coasters if defective