Check the listing for details. Personal Water Filter Straw 4Stage, Portable Water Purifier Reusable&Replaceable. Color: Purple, Condition: New. Listed at 11.99 USD. Membrane Solutions Water Filter Straw WS02, Detachable 4-Stage 0.1-Micron Portable Water Filter Camping, 5,000L Water Purifier Survival Gear and Equipment for Hiking Camping Travel and Emergency 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 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 Specifications Product Name Personal Water Filter Straw Brand Membrane Solutions Purification Capacity 5,000L Filter Stage 4-Stage Stage 1&2 coarse filter screen, pp cotton Stage 3 Activated carbon filter Stage 4 Hollow fiber ultrafiltration membranes Filtration Accuracy 0.1 Micron Model Water Filter Straw WS02 Leak-Proof YES Portable YES Length 6.7 inches Main Function Remove 99.9999% of dust,sediments and other impurities. Fit for river water, rain water, stream water, lake water, mountain spring water and cellar water. Be used for outdoor backpacking, hiking, camping, travel, hunting, fishing, scouting, emergency preparedness, etc Package included1.1x Purple Water Filter Straws 2.2x Purple Water Filter Straws 3.3x Purple Water Filter Straws 4.6x Purple Water Filter Straws