LifeStraw Peak Series Personal Straw Water Filter - Can also be attached to water bottles and to standard gravity hoses with removable threaded bottom cap. Unlimited shelf life means no need to worry about how long it's been in your emergency go-bag unused. Enhanced microfilter performance helps to reduce clogging from sand and siltfor better flow rate. Ultralight and durable, pack it anywhere for your backup hydration, emergency, or on-the-go needs. Membrane microfilter protects against 99.999999% of bacteria, 99.999% of parasites, 99.999% of microplastics, silt, sand, and cloudiness Meets US EPA & NSF P231 drinking water standards for the removal of bacteria and parasites Membrane microfilter lasts up to 1,000 gal | 4,000 L, pore size: 0.2 micron BPA Free, FDA approved, premium materials Includes: LifeStraw Peak Series personal water filter straw, user manual