Tea Sea: Height: Approximately 9.0mm. Diameter: 7.0mm. Capacity: 210cc White jade porcelain is considered to be as beautiful as purple clay. White jade porcelain is rich in natural minerals and contains trace elements beneficial to the human body. It is fired at a higher temperature than ordinary porcelain, making it strong. The surface is smooth and fine-grained, making it easy to clean and keep clean, and tea stains are less likely to adhere. Due to these properties, white jade porcelain is also used as a material for high-end cooking utensils for heating. White is good for enjoying the color of the tea, and it goes well with any color of gaiwan or tea. When in doubt, choosing white is a safe bet.