This cup is carved from a Japanese mountain cherry tree. The exterior is finished with lacquer (fuki-urushi), and the interior with glass paint. Because of the highly water-resistant coating, it does not require the same care as oil-finished tableware. It can be used for a variety of purposes, such as hot and cold drinks, ice cream, and yogurt. ※ Although we have checked the product's use with boiling water after completion, please avoid pouring boiling beverages directly into the cup as much as possible to prevent damage to the wood due to sudden changes in surface temperature.