S'well Men's Onyx Medium Bottle Imported 15 centimeters wide Designed to keep beverages cold for 24 hours and hot for 12, our water bottles feature triple wall construction with an extra interior copper layer for superior performance Our bottles are made from premium grade, 18/8 stainless steel thats non-toxic, non-leaching and BPA free 17oz bottle is perfectly sized to keep you hydrated all day long, from your morning commute, to meetings, to yoga class to work. Vacuum insulated to keep liquids and carbonated beverages fresh Swell bottles are backed by our one-year Satisfaction Guarantee The Shimmer Collection features a glossy lacquered finish and clean, classic colors that catch the eye