Zisha tea set is the best.
Zisha tea set is made of a porous material with double pore structure, with fine pores, high density and strong adsorption. When used to make tea, it not only keeps the color, fragrance and taste of tea, but also is not easy to spoil. Moreover, the longer the purple sand kung fu tea set is used, the brighter the pot body is, which is of great collection value.
don't buy colorful porcelain products and purple sand products, because it is probably mixed with chemical raw materials, which is harmful to your health.
Extended information:
Pay attention to the color of the tea set when buying. Touch the surface of the tea set with your hands to see if the inner wall is smooth. Don't choose a tea set with peeled, damaged or cracked glaze, which is likely to overflow metal elements during use. When buying ceramic tea sets, try not to choose glazed and electroplated ceramic tea sets. If you really like them, you must also choose the inner wall of the tea set without painting.
Reference: Baidu Encyclopedia-Zisha Tea Set