Features: Unique Water Filter: A must-carry tool for hiking, camping, travel, backpacking and emergency preparedness; replacement filter of gravity filtration system to provide pure water for Family and Group 4 Stage Filtration: 0.1 micron pore size reduces minimum 99.99999% odor, iodine, chlorine, heavy metals, make water tastes better Drinking Performance: Compact frame but bigger capacity, faster flow rate, filters up to 5,000 liters outdoors water of lakes, streams, rain and snow water, etc; does not require batteries and not expire like water purification tablets; very convenient to carry Versatility Uses: Comes in a powerful red coupling, ideal for connecting with soft water pouch or standard disposable water bottles to squeeze get clean water; or use silicone pipe to drink directly from any water source; innovative backwash design, no extra tools make cleaning easier Detachable Function: Membrane Solutions upgrade water straw filter both ends of it can be disassembled, use municipal water or pure Multi-Functional 1：Fits standard screw top bottles;Fill water bottle, attach screw top securely to the bottom of the water straw Multi-Functional 2：Use gravity, squeeze or sip water; Carry an empty water bottle and attach water straw when you are ready to drink Multi-Functional 3：Add a water filled hydration bladder, with tubing at both ends of the water straw, to stay attached, when on the go Package List: 1x Water Filter Straw

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