S'well Vacuum Insulated Stainless Steel Water Bottle, 25 oz, Ocean Blue Our bottles feature triple-walled construction, designed to keep beverages cold for 24 hours or hot for 12 Our bottles are made from premium grade, BPA-free 18/8 stainless steel. Condensation-free, the exterior will remain dry. 25 oz is great for long excursions or strenuous gym workouts. It also fits an entire bottle of wine! Authentic S'well products direct from the manufacturer are only shipped and sold from Amazon.com.