With double layer; Suitable for various hot or cold drinks; Adopts advanced technology, excellent quality, appearance with reference to the Swiss SIGG bottle design and paint level, different from the common aluminum sports bottle in the market; Can hold ice in summer and boiled water in winter; Durable: patent flexible internal coating, will never crack or fall off; Exterior paint is car lacquer that colour and lustre are gorgeous; Fashionable design; Health: food-grade non-toxic test, nano coating, could hold 100 degrees high temperature of hot water, tea, carbonic acid and tartaric acid, etc; Malic acid erosion resistance, no peculiar smell; Material: 99.5% of high purity stainless steel cup body, food grade PP lid for high temperature resistant; Thermal insulation: interlayer tank vacuum one, can keep the temperature around 10 hours; Not only suitable for young people travel, but also suitable for infants and the elderly to carry out water, feeding infant or taking medicine for older people; Safety: seal the safety standards of medical level, the cork is made of high strength PVC, anti-lost; The mouth is processed w/ bright processing, drinking more safe and health; Leak proof: the lid is made of high temperature resistant food grade PP, great quality; Precision mold cork, extended thread with anti-crack bottle, completely prevent leakage.