Keeps beverages cold for 24 hours and hot for 12 TempShield double-wall vacuum insulation for maximum temperature retention Leakproof when closed for secure transport Pure taste with no flavor transfer Durable stainless steel construction Wide Mouth opening accommodates ice cubes BPA-free design for safe use Not for use on a stove, microwave, or freezer Keep hot liquids out of children*s reach Stainless steel, insulated, refillable, reusable*our 20 oz wide-mouth water bottle is the flask to grab to keep cold drinks cold and hot ones hot. The large opening makes it easy to add ice*and get yourself a bigger gulp.