The award-winning LifeStraw? Personal Water Filter can travel with you anywhere. Weighing just 2 ounces and only 9 inches long, LifeStraw? is ideal for hiking, backpacking, camping, travel, and emergency preparedness. The straw-style filter design lets you turn up to 1,000 liters of contaminated water into safe drinking water, filtering out protozoa and bacteria. LifeStraw? Personal uses advanced hollow fiber technology. This highly efficient method of filtration requires no chemicals. Simply place one end of the LifeStraw? tube into unfiltered water (a water bottle, river, or even a puddle) and suck clean water through the top of the straw. Follow the instructions provided for your first use.Lets you drink directly from streams and lakes or from a bottle. 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? doesn?t use iodine or iodinated resin chemicals and is BPA-free. Meets US EPA drinking water standards. Ultralight: weighs only 2 ounces or 57 grams. Portable: only 9? (22.5 cm) long and 1 inch (2.5 cm) in diameter. Requires no electrical power, batteries or replacement parts. BPA free and contains no chemicals. Raw materials meet US Food and Drug Administration regulations and standards.