Material: Smart thermos mug with LED temperature display, made of high-quality 304 stainless steel thermos mug, which can keep heat for 24 hours, and is equipped with a silicone bottom to prevent it from sliding and overflowing. The other parts of these travel mugs are made of BPA-free PP material, food-grade contact silicone and 100% copolyester plastic, so it is safe and healthy to use. Maintain temperature: Double insulation. This stainless steel water bottle has double insulated walls, which can keep the temperature hot and cold optimally. Practical: The smart water cup ontains a detachable tea strainer, Perfect as a brewing hot and cold tea, coffee, hot water and juice carafe.It can even be used with ice for extra cold refreshment.