Stainless steel vacuum insulation keeps beverages hot or cold for hours. Heat retention 190f 1 hr. 163f 6 hrs., cold retention 46f 6 hrs.Stopper disassembles for thorough cleaning2Step lid release process prevents excess condensation on the stopper from being flung off while the lid opensEasytoclean double layer nonstick Coated interior enhances durability, and provides greater protection of the Stainless steel against saltcontaining beverages like sports drinks Safety lock to prevent the lid from opening accidentallyA vacuum bottle, also known as a thermos bottle or vacuum flask, is a type of insulated bottle or flask that uses vacuum between its walls to keep hot liquids hot and cold liquids cold. These premium vacuum insulated water bottles which are also thermal water bottles exemplifies ease, affluence and style usingits advanced technologies