The Hart & Huntington 27 fl. oz. stainless-steel water bottle with sport cap is a great companion on bike rides, at the track, workout sessions and adventures in the mountains. It is made of single wall, 18/8 food grade stainless steel and is 100% BPA Free. It is much better to use than the plastic containers which are bad for the environment and kill the fresh taste of water and other cold beverages. Each bottle comes with both a sports cap and a loop cap with carabiner.