A Yixing teapot is a small, unglazed clay teapot made from zisha, “purple sand” clay dug near Yixing, China, and prized for brewing gongfu-style tea.
The clay itself is the point. Yixing’s zisha is dense but porous, so over repeated use it slowly absorbs trace oils and flavor from the tea brewed in it, seasoning the pot and, tea drinkers claim, deepening the character of every later brew made in it. That’s why serious owners dedicate one pot to a single tea, usually oolong or pu-erh, rather than switching teas between sessions, and why an old, well-used Yixing pot can be worth far more than a new one of identical shape.
Because they’re small and hold heat well, Yixing pots pair naturally with gongfu cha, the brewing method built on packing a small vessel with leaf and steeping it many times in quick succession. The pot doesn’t require gongfu brewing to be useful, but the two developed together and are still most often used as a pair.
