Coffee mug made of high-quality 304 stainless steel and food-grade ABS plastic materials, taste-free. Double-layer cup body vacuum design, better thermal insulation effect, wear-resistant, anti-oxidation, corrosion-resistant. Sealed against leaks, locking the temperature of the cup, enjoy your coffee easily wherever you go. The Tumbler lid adopts a flip design, easy to drink in small sips, prevents scalding of the mouth.