Klean Kanteen\'s quest to find and replace single-use items knows no bounds. Their tumblers lead the charge; replacing years of single-use cups while handily out performing plastic and paper. A toast to health and sustainability!. Features:. Insulates hot beverages up to 4 hours.. Insulates iced drinks up to 20 hours.. 18/8, food-grade stainless steel.. Durable and won\'t break like glass.. Doesn\'t retain or impart flavours.. Electro-polished interior, laser-etched exterior.. Double wall vacuum insulated.. Lifetime warranty.. 473ml (16oz).. Complete with lid.