#316 Stainless Steel liner, pottery spray technology inside, heat preservation and cold preservation, upside down without leakage, double use for one cup. It adopts 316 Stainless Steel vacuum cup body, upgrades the internal spraying pottery process, is safe and healthy, and has a seamless inner tank, so there is no place for dirt to hide, and it is easier to clean than ordinary Stainless Steel thermos cups. The original cup lid is retained, and the design of the 10mm large-caliber thick straw is designed to drink water more freely and can also suck pearl milk tea