1. The cup body is made of purple sand and imported 304 # stainless steel using the latest technology of precision production. The combination of purple sand and stainless steel effectively compensates for the disadvantage of easy breakage of the porcelain liner; Solved the defect of non insulation of purple sand; 2. The inner liner is carefully developed using Yixing natural purple clay (rich in various trace elements and minerals that the human body needs); 3. The bottom of the cup has a unique breathable hole and a unique gas internal circulation structure, which avoids the phenomenon of high vacuum cups being easy to cook tea leaves and also ensures the breathability of the purple sand cup. It has the advantages of making tea without losing its flavor and easy to spoil, making the tea soup more fragrant and delicious. 4. The inner side of the cup cover is designed with a mirror finish, which is delicate and smooth, making it less prone to residual dirt after long-term use. 5. The 304 # stainless steel imported from the outer side and the purple sand inside are connected together through a unique spiral pattern