Turn tap water into great tasting pure water with the Camelbak .6L Stainless Steel Groove Bottle. It has a water filter built right into the straw allowing you to have clean, fresh tasting water wherever you go. Re usable, BPA free and spill proof, the Groove is easy to refill and easy to use. The patented Big Bite valve adds an extra bonus as you can sip and flip shut for storage with no spills. Hydrate on the go, filters as you sip. Easy to carry loop. Sip with ease, flip shut for storage. No spills with big bite valve. Dishwasher safe. Material:18 8 stainless steel Capacity: .6L 20 oz. 300 Refills.