Made of high quality stainless steel, the stainless steel glass performs well at locked temperatures thanks to its double-layer insulated design, so you can always have a fresh, cold drink on hand. For an afternoon iced coffee or a cold drink after a workout, this glass is the ideal choice. BPA-Free Lid The body of mug is made of food-grade 304 stainless steel, and the lid is BPA-free. There is no bad smell when you use it. Let you drink every sip of water, are sweet and healthy. Sealing Ring Gasket Good sealing performance prevents drinks from spilling out, and also makes the cup better insulated to prevent heat from spreading. Double Wall Vacuum Insulation Adopt double-layer structure. The vacuum of the cup liner and cup body can block the heat transfer. The cup is not hot, more convenient to use. Anti-slip Cup Bottom Increase the friction between the bottom of the cup and the desktop, placed on the table is not easy to slide over, but also to prevent the bottom of the cup wear. Heat sublimation is a kind of thermal transfer printing, the pigment is printed on the transfer paper, and then the pigment is sublimated to the medium to be printed after high temperature, which can be used on materials such as porcelain, glass, metal, plastic, taping, chemical fiber or textile containing less cotton. The products printed by heat sublimation basically do not feel the existence of the ink layer, bright colors, rich and clear layers, high artistry and strong three-dimensional sense.