I don't know what you mean by true or false. If you refer to the material, it should be purple sand under normal circumstances. Purple sand mud is a good material by nature, so the advertisement of ecological cup above is a bit of a fuss. In fact, there is nothing high-tech that depends entirely on purple sand. Moreover, there is no brand that is not branded. Anyone who makes pots in Yixing can do it. In 200 yuan, molds must be made by hand.