1、Stainless Steel Material: The inner wall is made of 304 grade food grade stainless steel and the outer shell is made of high quality 201 stainless steel. They don't slide and spill. Safe and healthy to use. 2、Temperature Display: The smart water bottle has an LED display, anti leakage, low energy consumption, no need to replace the battery, can be used for years! Gently press the top of the water bottle, and the sensitive touch cover can instantly display the water temperature in the water bottle, avoiding the embarrassment of scalding. 3、Easy to Clean: The structure is simple, the mouth can be removed for cleaning, the mouth of the cup is smooth, it will not cut the lips, the diameter of the cup is large, and the detachable filter can filter the residues such as tea leaves. The bottom of the cup is not easy to slip off and is durable. 4、Perfectly Designed: The cylinder is designed to reduce spillage and shaking. The bottle is leak proof and safe on the go. The 500ml water bottle fits most cup holders and fits easily in a travel bag. This vacuum insulated tumbler bottle is the perfect gift for any occasion. 5、Versatile and Portable: Take this portable water bottle with you when hiking, biking, shopping, or leaving it at the office. Sitting anywhere in any temperature condition, your cold drink will stay completely chilled for up to 24 hours, or your coffee or tea will stay hot for up to 12 hours. 1 x Vacuum Insulated Water Bottle Item Type: Double Walled Vacuum Insulated Water BottleMaterial: Inside 304 Stainless Steel and Outside 201 Stainless SteelCapacity: 500mlWeight: Approx. 302g / 10.7ozBattery Capacity: 50mAh (Shipped with Built in Button Battery)Battery Type: Button Battery (1Pcs)Battery Model: CR2032 (1 Piece)Size: Approx. 6.5x 23.5cm / 2.6x 9.3in