Personal camping purification water filter straw for survival or emergency supplies.    Features: 1. FILTER MORE: Filters up to 2000 liters of natural fresh water without using any chemicals. 2000L clean and drinkable water in a backpack on the go.  2. VERSATILE DESIGN: Easily set up a DIY filtration system by soda bottle like Coca-Cola bottle, plastic bag, collapsible bottle or bucket. Or drink directly from water source like a straw.  3. BACKFLUSHING WITH EASE: Threads on filter both sides. A handy 28mm threads bottle can be screwed on water filter outlet for backwashing.  4. Reliable filtering result: 0.1 micron membrane ensures 99.999999% removal rate of bacteria. TUV and SGS testing reports.  5. Superior material: FDA approved. Impact resistance and ultra-light L630 fits in the palm of your hand. Lifespan can be extended by backwash. Good choice for camping, hiking, fishing, scouting, travel, military, survival use, or emergence supplies.    Specification: Type: Water Filter;  Firltration Pore Size: 0.1micron;  Size: 40*136mm;  NW: 40g;  Material: ABS, UF(medical grade), Silicone;  Filtration Capacity: 2000L;  Water flow: 0.6L/min ;  Type: Outdoor Water Filter;  Application: Running Fresh Water Source;  Use: Camping,outdoor activities,emergency survival tools;  Color: Green;