A sushi rice mixing tub handmade by Japanese craftsmen The Japanese Sawara cypress wood material absorbs just the right amount of moisture from the rice This ensures the sushi rice does not get soggy and achieves that desirable fluffy texture The outer bands are sturdy and made of copper Used to mix rice and vinegar when making rice for sushi This tub can also be used for making sushi or even as a container for chirashi sushi Moistening the tub with water before use will prevent rice from sticking to the tub Sawara cypress wood produces a very pleasant aroma and will stimulate the appetite when combined with the flavor of vinegar Furthermore the fine grain of this wood prevents it from shrinking after drying Oke Diameter 13 33 cm Depth 35 9 cm Lid Diameter 13 33 cm Height 12 3 cm Made in Japan Not dishwasher safe There might be a gluelike substance on the product but it is a tree sap of Hinoki cypress When the temperature rises such as in the summer the accumulated matter in the cypress will be secreted It does not affect the human and can be removed by washing