The LifeStraw Go with 2-Stage Filtration is ideal for hiking, backpacking, camping and travel. The 2-stage filtration process removes bacteria and protozoa and reduces organic chemical matter and chlorine. Stop at a river, stream, or even a puddle. Fill up the bottle, screw on the lid, and sip filtered water through the mouthpiece.Hollow fiber membrane filters up to 264 gallons (1,000 liters) of water down to 0.2 microns. Lifetime of 26 gallons (100 liters) for the replaceable carbon capsule. Removes 99.9999% of waterborne bacteria and 99.9% of waterborne protozoan parasites. Reduces chlorine, organic chemical matter, odor and bad taste. Durable, leak-proof bottle made of BPA-free Tritan. Filter and mouthpiece detach for easy cleaning. Includes 2.6 in x 0.2 in carabiner for easy carrying. Capacity: 23 fl. oz. Wt. 7.8 oz Dimensions: 9 in x 3 in. Mouthpiece Material: Food grade silicone.