Donabe are earthenware pots used over an open flame and ovens. Generally, they are glazed on the inside and porous on the outside. Properly treated many donabes have lasted for decades. "Whenever one obtains a new donabe," an expert advised, "one should let the donabe boil water for hours and dry before using it for cooking." However, others suggest the user should simply fill the donabe with water and let it sit overnight. See "Donabe". Wikipedia. Retrieved 2014-09-16.