This pottery tea set comes with a teapot and four tea cups made of the unique Chinese purple clay or Zisha from Yixing, Jiangsu of China.Purple clay is famous for its unique properties to make it ideal for brewing tea. The quality most immediately apparent is the attractive color of purple clay. This color, sometimes augmented by natural pigments, is never hidden on Yixing teapots by glazes. Similarly, the inside of Yixing teapots are always left uncoated. The fine texture and porous nature of purple clay absorbs the flavor, smell, and color of the tea that is brewed in it. Over time, Yixing teapots develop a seasoning from repeated use, making the tea brewed from a well used teapot a special treat. For this reason, most people will dedicate a single flavor of tea to a specific Yixing teapot, so that the seasoning is not disrupted by cross-brewing.