The Groove water bottle turns tap water into fresh, great-tasting water anywhere. Sustainable, plant-based filter lasts about 3 months or filters 48 gallons of water. Double-wall bottle keeps water cool and reduces condensation. Easy to refill bottle has a filter built into the straw. The Groove bottle is durable and spill-proof. Integrated loop handle makes it easy to clip a carabiner or carry with the crook of a finger. BPA-free Eastman Tritan Copolyester construction. Weighs 10-1/2 oz.