The wood in this large beautiful bowl is from a California Bay Laurel tree, or as they call them in Oregon, Myrtle Wood tree. It can be used for serving salads, chips, crackers, and other such items. A walnut oil finish was used to help protect the wood's character. The bowl may be cleaned with warm water and mild detergent. Wipe dry immediately. It can be re-oiled with walnut oil (found in grocery stores) or mineral oil. Do not use vegetable oils as they turn rancid in time.