Zisha is a special purple-hued stoneware particular to Jiangsu Province, China. Common Zisha products are mainly pots, supplemented by miscellaneous items such as flowerpots and water jars. Most Zisha is round, square, or of other simple geometric shapes and is used as a vessel to brew tea in the ‘loosing tea method’ of the oriental tea ceremony. Boiling water is added to tea leaves in the purple clay pot, creating tea soup mixed with tea leaves and tea water.