This large betel box, known as kun-it, is fitted with three trays. A mixture of clay and lacquer applied in layers strengthens the bamboo core, and a final coat of fine quality lacquer gives the lacquerware its characteristic black colour. The designs on this box are engraved and filled with red cinnabar, before being sealed with a coat of resin.It has been suggested that the simple design of wavy lines known as za-yun are derived from basket weaving. Betel nut was offered to guests, and as a token of favour to an admirer or from one’s superior, hence the betel box was essential as an item of hospitality in homes.