This 17 oz bottle seals in flavor and temperature. The Smartie double wall insulated stainless steel bottle has an inner copper lining and includes a threaded lid and gasket which will keep your drinks cold (18-24 hours) or hot ( 8-10 hours). The unique construction of this bottle circulates the temperature and is leak proof and rust proof. Now available in a larger size (25 oz) and your logo can be single color or full color. Great for games, banks, restaurants, giveaways, camping, and more.