Yixing clay teapots are also known as “Zisha” or Purple sand teapot. Yixing teapots are commonly for use with black and oolong teas, as well as aged pu’er tea. Yixing teapots absorb a tiny amount of tea into the pot during brewing. After prolonged use, the pot will develop a coating that retains the flavour and colour of the tea. A studious tea connoisseur will only make one type of tea in a particular pot, so as not to corrupt the flavour that has been absorbed.