Mage-wappa Bento Box, Natural Wood, Lacquer Finish Because of the lacquer finish, detergent can be used! Used about 2-3 times a week for about six months. Since it has been used, the initial steps like soaking in water are unnecessary. I washed it carefully with a dishcloth, so there is no odor transfer, scratches, or peeling of the paint. The size is suitable for a woman who eats a lot to a standard single meal for a man. I bought it at a local product fair. I will take waterproof measures and ship it.