Small cups of this type are extremely rare, this form more often having been decorated with anhua incised dragons or covered in lemon yellow or other enamels. For a dragon-decorated cup in the Palace Museum, Beijing, see Geng Baochang, ed., Gugong Bowuyuan cang Qingdai yuyao ciqi [Porcelains from the Qing dynasty imperial kilns in the Palace Museum collection], Beijing, 2005, vol. I, part 2, pl. 8. See also a slightly larger pair of undecorated white cups from the Meiyintang Collection sold in our Hong Kong rooms, 7th April 2011, lot 26.