Our 20oz Traveler Bottle is a Double-walled, Copper Insulated vacuum sealed item that is made from all 304 Grade 18/8 stainless steel. Featuring a silicon carrying handle that also prevents cap loss, This is the perfect bottle for your everyday carry and will provide a stylish look everywhere you go! Keeps drinks cold for up to 24 hours and hot for up to 12 hours. California prop 65, FDA Compliant, BPA and Phthalates free.