Large Capacity: Filters a minimum of 2,000 liters (530 gallons), contaminated WITHOUT iodine, chlorine or other chemicals. Personal Water Filters are ideal for backpacking, travel and emergency situations. Filtration Performance: Our water filtration removes a minimum of 99.9999% of the original bacteria waterborne, as well as 99.9999% of waterborne parasites, exceeds EPA standards for water filters. Portable and Ultralight: Water filter straw weight alone 65g, portable design with metal buckle and lanyard, is essential for outdoor outing or travel. (Note: sea water, carbonated drinks and industrial polluted water can not be filtered) Simple to Use: You can use it directly in the river, stream, lake . Configure the extension straw, so you can also connect it with a water bag, bottle and tubes to drink clean water.