The main material of the casserole is imported petalite from South Africa, which is pure in color, low in impurities, soft, and has strong translucency. Moreover, the lead and cadmium dissolution is zero. The manufacturing process is very sophisticated, involving ten steps: mixing, pressing, sieving the clay, stomping, kneading, loading into the kiln, firing, forking, and smoking. It requires great effort to ensure the quality.