Selected A mineral porcelain clay, using high-strength, high-hardness and high-wear-resistant corundum balls. It is processed through 72 hours of grinding and 48 hours of imported mechanical circulation for impurity removal. It reduces the content of heavy metals such as lead and mercury. The cup has a high density and good thermal stability, making it less likely to shatter when boiling water is poured in. It is safe for microwave ovens and less likely to produce tea stains, thus ensuring better food safety. The ideal household appliances decorate your little home. They are simple and elegant, and can accompany you for a long time.