Combination of sediment prefilter, 0.01 micron membrane filter straw ,activated carbon fiber; remove all visible solid sediments,reduce 99.99999% of harmful substances, and improve the odor, ensuring the safest water in the worst environments. 4000L(1,000gallons) capacity guaranteed. Faucet mounted compatible water purifier straw; universal PET bottlle adapter; BPA free reuseable pouch; food grade silicone pipe 2.0ft(60cm). The basic disaster tool in the survival bag.