This Heating Coaster is made by aluminum and Stanlinite. It can be heated any drink with flat-bottomed container. 2 options for temperature. Constant temperature, right temperature for your hot drinks, 8 hours Automatic Power Off protection!! Heating area over 70%. We can rush service and the price includes shipping cost to ca. QTY over 5k by ocean. Available color: red black, golden. Size: dia 4 5/7″ x 1/2″. We are GLAD to get SINGLE PIECE ORDER, LOL!!! 100% Satisfaction Guarantee!