Natural wood! A delicate and beautifully crafted sake cup. It's a vessel with a beautiful wood grain. Due to long-term storage, there are areas with variations in wood color and discoloration. Please refer to the photos. It's carefully made by a craftsman. It appears to have no surface coating. It has a natural feel. 6.5 cm diameter 3.5 cm height Unused, but it has been stored in a tea cabinet.