The THERMOS Element5 24 ounce element vacuum insulated backpack bottle is an ideal choice for all day beverage enjoyment, hot or cold. Thermos vacuum insulation technology will keep your hot drinks hot for up to 12 hours and your cold drinks cold for up to 24 hours. Features include a specially-designed smooth flow lid that helps control the flow of liquids and an easy to use one-handed push button lid with a locking ring for secure transport.