This is 304 stainless steel thermos with food grade double wall vacuum design. Keep heat for 12 hours and cold for 24 hours. Easy to clean, simple in structure and detachable teapot. The capacity of 17 ounces is very suitable for carrying. Suitable for almost all cup holders such as cars, cinemas and planes. Used easily in outdoor sports, offices, beaches, schools, picnics and other occasions. 8 7/8" H × 2 1/2 DIAM