A cup is a special container for holding water. Its main functions are used for drinking or drinking tea, and the volume is generally not large. Or cups for drinking tea in ancient times were called gaiwans. The basic shape is mostly straight or open, and the diameter of the mouth is almost equal to the height of the cup. Available with flat bottom, ring foot or high foot. Archaeological data show that the earliest cups appeared in the Neolithic Age. Whether it is in the Yangshao Culture, the Longshan Culture or the Hemudu Culture site, there are pottery cups. During this period, the cups were the most peculiar and diverse: the cups with ears were single-ear or double-ear cups, and the ones with feet were mostly conical, Three-legged cups, goblet-shaped cups, high-handled cups, etc., can be divided into glass cups, plastic cups, ceramic cups, wooden cups, etc. according to different materials.