A Xi Shi teapot is a classic, elegant style of unglazed Yixing (Zisha) teapot, named after one of China's legendary beauties, Xi Shi, known for its graceful, rounded body resembling a full bosom, with a distinctive nipple-like knob and simple spout, prized for its porous clay that seasons and enhances tea flavor, making it perfect for Gongfu brewing of specific tea types like Oolong or Pu-erh.