1.Survival Gear for Outdoor Water Needs If you want to obtain healthy drinking water simply and quickly, you can use this survival gear. The mini and lightweight filtering system are ideal for recreation, hiking, camping. Its also your good companion for scouting, domestic and international travel, emergency preparedness. 2.Portable Long Life-Span - This straw filtration at only 163mm long and 32mm in diameter fits most bottle, cup, or glass. It weighs just 60g and fits in the palm of your hand, pocket, gym bag, backpacks, survival packs and purses. You can take it most where you want conveniently. 3.High Stage Filtration : Our high Stage Filtration system including coarse filter screen, pp cotton, coconut shell activated carbon and hollow fiber ultrafiltration membranes. which can remove more of harmful substances (pollution, odor, chlorine and organic chemicals, etc.) and improve the taste. Ensuring the safest water in the worst environments. 4.Smaller Pore Size : We all know that the smaller pore size, the higher the filtering accuracy, Our pore size is 0.1 microns which can filter out more of the tiny material. Compared to the 0.2-micron filter straw on the market, Membrane solutions 0.1microns pore size filter straw maintains the optimum flow rate while maintaining the filtration accuracy. 5.High-Quality Materials : Build out of high quality strong food-grade plastics, manufactured with BPA-Free ABS, ensures water safety and delivers a better drinking experience. Compared to the big filter straw on the market, membrane solutions water filters have a smaller frame, more convenient to use.