Water leak proof,it's low energy consumption and without a battery change,That can use several years! Press the top of the thermos softly,Sensitive capacity touch-cover can show the temperature of water inside the thermos immediately that can avoid the embarrassment of burning your.PREMIUM Material-The inner wall is made of 304 grade food grade stainless steel and the outer case is made of high quality 304 stainless steel.They also have the silicone bottom which is designed to prevent them from sliding and spilling. Other parts of these Travel mugs are made of BPA-free PP materials ,food grade contact silica gels and 100% Co-polyester plastic that make them Safe and Healthy to use.EASY TO CLEAN-The inside of the lid is embedded with PP leak-proof silicone ring. Simple structure, washable with a spout removed,The cup mouth is smooth, it will not cut lips, the cup has large diameter, It has detachable filter net, can filter the residue such as tea. The bottom of the cup is made of non-slip material, which is not easy to slip off and is durable.PERFECT DESIGN-Steel flask is designed to reduce spills and sloshing. The bottle flask is leak proof and safe in the bag while on the go. 17oz / 500ml water bottle fit in most cupholders and easily fit in a bag to travel.MULTI-USE&PORTABLE-Take this easy to carry portable water bottle while hiking, biking, shopping or leave it at the office. While sitting anywhere in any temperature condition, your cold drink will stay perfectly chilled up to 24 hours or your coffee or tea will keep hot for up to 12 hours. The insulated water bottle is a great gift for any occasion.