These (8-1/4"H) 20 oz. Aluminum Water Bottles are ideal for staying hydrated on a hot summer day! They have a screw-on, spill-resistant lid and split ring attachment that can be attached to a backpack with a carabiner. Take this bottle with you when you go bike riding, running, or swimming to see how much longer your drink stays cold. Also, the bottles are BPA free and are made in a FDA compliant facility.