The multi-functional, Mini Water Filter Straw With Water Bag Injector can be used in three different ways, giving you versatility in many situations. It can be used directly in the water as a straw, it can be threaded onto a 28mm standard water bottle or attached to the included hanging water bag via the silicone tube. The medical grade filtration system, which has a hollow fiber UF membrane, will remove 99.99 percent of both bacteria and protozoa. It is capable of filtering up to 900 gallons of water. The body of the water filter straw is constructed of ABS with silicone ring seals and it features a mouthpiece cap. It’s a must-have for camping and hiking trips, survival and bug-out bags and for your vehicle emergency gear.