Founded in 1913 by inventor William Stanley Jr., the brand pioneered the all-steel vacuum bottle, fusing vacuum insulation with the strength of steel to create a portable, unbreakable container that keeps contents hot or cold for hours. Stanley products are made from rugged, 18/8 stainless steel and are designed to be reusable for a lifetime, reducing the need for disposable products. This commitment to sustainability is supported by a lifetime warranty. The 40-ounce bottles formally known as Quencher H2. 0 FlowState™ Tumblers, can keep hot drinks hot for seven hours, cold drinks cold for 11 hours and iced drinks iced for two days.