Nikken PiMag Sport Water Bottle - Leak Proof Sports Water Bottle | Made from Eco-Friendly Bio-treated Plastic | Cool for Fitness and Outdoor Enthusiasts Hiking, Bike, Gym, Soccer | Capacity 21 ounce The Sport Bottle is environmentally responsible in many ways: the biodegradable bottle shell (containing no BPA or other potentially harmful compounds) eventually breaks down into natural soil nutrients. INCLUDES: 1 Bottle of PiMag Water Filtration Sport Bottle The PiMag Sport Bottle features a unique, patent-pending microfilter that meets or exceeds internationally recognized filtration standards. Filter components are replaceable, to extend the life of the bottle. Proprietary Nikken PiMag Water Technology combines a magnetic field that helps to reduce sediment agglomeration with features that add natural minerals and adjust pH value.