Engineered with advanced multi-layered technology, this vacuum-insulated, double-walled bottle keeps beverages cold for up to 24 hours or hot for up to 12. Details: Comes In Two Color Options Materials (internal to external): food grade stainless steel, cooper layer, vacuum insultated, stainless steel, and finally a coat finish Size: 8.5 x 3.0 in Capacity: 17 oz ( cold for 24 hours, hot for 12 hours) Categories: Stainless Steel Water Bottle, Double Insulated and Thermos, Gym Water Bottle, Office Water Bottle, Corporate Gift, Minimalist Thermos, School Water Bottle