Specification: Item Type: Vacuum Insulated Water Bottle Material: 304 Stainless Steel Inner Wall, 201 Stainless Steel Outer Shell Capacity: 500ml Battery Capacity: 50mAh (Built in Button Battery) Battery Type: Button Battery (1 Piece) Battery Model: CR2032 (1 Piece) Product Size: Approx. 23.5 x 6.5cm / 9.3 x 2.6in Weight: Approx. 302g / 10.65oz Package List: 1 x Vacuum Insulated Water Bottle Features LED Display: Smart water bottle Features LED temperature display that can avoid the embarrassment of burning your mouth and lips. Stainless Steel: The inner wall is made of 304 grade food grade stainless steel and the outer shell is made of high quality 201 stainless steel. Easy to Clean: Vacuum insulated water bottle possesses removable spout and detachable filter net, providing more convenience for cleaning. Wide Application: Suitable for travel, hiking, biking, shopping, and office, to reduce shaking, and the bottle is leakproof and safe on the go. Perfect Gift: 500ml water bottle can keep your beverage cold for 24 hours, or keeping your coffee hot for about 12 hours. Ideal and perfect gift for your friends and family.