Ui MUG Insulated Mug - Qi Charging Compatible (White) This ceramic mug maintains a temperature of 55°C, providing warm beverages for a long time. Ui Mug is an innovative self-heating mug system that keeps coffee and tea at the perfect drinking temperature for an extended period. Furthermore, the coaster (charging base) can also be used independently as a Qi charger, allowing you to wirelessly charge your smartphone. https://besign.jp/smartphone/detail.html?id=000000007106 ● Size: Mug: Diameter 91.8 x 99mm, Charging Base: Diameter 105 x 17mm Mug: Approximately 310g, Charging Base: Approximately 150g Cup Capacity: 355ml ● Materials: Mug: Fine Ceramic Charging Base: Anodized Aluminum Alloy, Tempered Glass ● Other Notes: Please understand that this is a used item before purchasing.