Water-absorbing Coaster Made From Genuine Japanese Red Tile [Whale Shark] (Light Pink) This convenient, original coaster made from red tile absorbs condensation from your cup. It is made from genuine Okinawan red tile at a tile factory in Okinawa, Japan. Capable of absorbing up to 0.67 oz of water at a time, the coaster can be reused after drying. The etched pattern prevents cups from sticking to the surface. Each coaster is distinctive and has a different essence for you to enjoy.