Your perfect travel companion. Keep life moving with this 21 oz. Hydro Flask bottle and Standard Flex Cap. It stashes easily into a small shoulder bag, your pack's side pocket, or your car cup holder, and holds enough ice cold goodness to keep you going for hours without weighing you down. No wonder it's a bestselling Hydro Flask. Versatile, middle-of-the-road size. TempShield insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours. Durable 18/8 Pro-Grade Stainless Steel construction. BPA-Free and Phthalate-Free. Compatible with Standard Mouth Insulated Sport Cap. Lifetime Warranty.