Thirstystone Coasters are the leader in drink coaster innovation. The naturally absorbent sandstone material, combined with the cork backing, will add an additional layer of protection your furnishings, and provide a stylish accent piece to your home or business. Thirstystone coasters are a long lasting and environmentally friendly product. Sold as a set of 4, these 4 inch coasters are very stylish, useful, and affordable.