A ewer of similar form and size decorated with dragons and dated 17th century is illustrated by H. Brinker and A. Lutz, Chinese Cloisonne: The Pierre Uldry Collection, The Asia Society Galleries, New York, 1989, no. 159. On the Uldry example, however, the crown-shaped rim is actually part of the hinged cover. Ewers of this type, both in cloisonné enamel and porcelain, are copying earlier Tibetan proto-types that were most likely made of some other material that needed to be held together with leather or metal straps. The Tibetan name for this type of vessel means 'container for butter', but they were also used for milk and wine.