4 Piece Bamboo Coaster Set with Case offers a natural solution for protecting tabletops. These sturdy coasters are crafted from organically-grown Moso bamboo, an environmentally-friendly material solution that quickly regrows once harvested. Bamboo is both lightweight and durable— a perfect choice for coasters! The coaster set includes a handsome case to store coasters neatly when not in use. The coasters are easy to care for as well: simply wipe them with a damp cloth to clean. Each coaster measures 4 inches by 4 inches to accommodate all popular sizes of glasses and mugs.