Stainless steel vacuum insulation keeps beverages hot or cold for hours2-step lid release process prevents excess condensation on the stopper form being flung off while the lid opensA special manufacturing technique was used to make the body ultra-lightweight and compactMade of BPA-free plastic and stainless steelTight fitted flip-open lid keeps beverages hotter or colderA 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 using its advanced technologies.