Material~ This thermos mug is made of high quality food grade 304 stainless steel, BPA free, safe and healthy to use and harmless to human body. Sturdy, rust-proof and long-term useHeat preservation~ This stainless steel vacuum insulated mug has a heat preservation function. For 100 hot water, the thermos mug can maintain over 35 for 12 hours in summer and 6 hours in winterLid~ The lid of this vacuum insulated mug is leak proof and can keep the mouth of the water cup clean and sanitary. The lid of the bottle is designed in the shape of rabbit ears, which is very unique and cuteUse~ This cute vacuum insulated cup is small and easy to carry, suitable for use in the office, with the family, at school and while travelling. Cute rabbit cartoon shape and beautiful colors are a good gift for children