LifeStraw Go incorporates award winning LifeStraw technology into a refillable water bottle, so you can carry safe drinking water with you on the go. Simply scoop water from a river or pond, screw the lid on, and sip safe water through the mouthpiece. The water bottle design is ideal for hiking, backpacking, running, and other activities where youre on the move and aren't always near a water source. LifeStraw Go uses advanced hollow fiber technology. This highly efficient method of filtration requires no chemicals. Drink directly from streams and lakes using the straw, or fill up the bottle and take it with you. Uses advanced hollow fiber membrane technology to filter up to 264 gallons or 1,000 liters of water to 0.2 microns. Removes 99.9999% of waterborne bacteria, including E. coli and salmonella. Removes 99.9% waterborne protozoa, including Giardia and Cryptosporidium. Reduces turbidity muddiness. No aftertaste: LifeStraw doesnt use iodine or iodinated resin chemicals and is BPA free. Meets US EPA drinking water standards. Sturdy and ultralight: weighs only 5.9 ounces or 168 grams. Portable: only 9.25 235 mm long and 3.14 80 mm in diameter. Features a flip top bite valve and carabiner for attaching to your backpack. Requires no electrical power, batteries or replacement parts. Storage volume: 22 ounces 0.65 liters. BPA Free and contains no chemicals. Raw materials meet US Food and Drug Administration regulations and standards.