Membrane Solutions: Straw Water Filter, Portable Survival Filter, Emergency ?Survival Gear for Outdoor Water Needs - SGS certificated, Test Report NBF21-004693-01. If you want to obtain clean drinking water simply and quickly, you can use this survival gear. The portable and lightweight filtering system is ideal for recreation, hiking, camping. It?s also your good companion for scouting, domestic and international travel, and emergency preparedness. ?Portable Long Life-Span - This straw filtration at only 7.1'' long and 1" in diameter fits any 28mm threaded bottle, cup, or glass. It weighs just 2 ounces and fits in the palm of your hand, pocket, gym bag, backpack, survival pack or purse. Both ends of the Upgrade water filter straw are removable for cleaning to extend Longer Lifespan ensuring it provides up to 1,320 gallons (5,000 liters) of drinking water. Don't miss this opportunity to drink clean water conveniently wherever you go. ?5-Stage Filtration - Our Upgrade 5-Stage Filtration System includes a coarse filter screen, double layer pp cotton fiber, coconut shell activated carbon and hollow fiber ultrafiltration membranes. which can remove 99.99999% of harmful substances (pollution, odor, chlorine and organic chemicals, etc.) and improve the taste. Ensuring the safest water in the worst environments.(IT DOES NOT LOWER TDS VALUE, ensuring water's essential mineral balance remains untouched.) ?Smaller Pore Size - We all know that the smaller the pore size, the higher the filtering accuracy, our pore size is 0.1microns which can filter out 99.99999% of the harmful particles. Compared to the 0.2-micron water purifier straw on the market, Membrane Solutions 0.1 microns pore size water purifier straw maintains the optimum flow rate (16.9 fl oz/min / 500ml/min) and a high filtration accuracy at the same time. ?High-Quality Materials Versatile Filtering Modes - Made of durable food-grade plastics, manufactured with BPA-Free ABS, ensuring safe and quality drinking water. Compared to the big filter straw on the market, Membrane Solutions water filters have a smaller frame, more convenient to use and more filtered modes, ideal for connecting with a soft water pouch or disposable water bottle, even as a replacement gravity filter to get pure water for family group.