Food Grade Material - Build out of strong food-grade plastics, manufactured with BPA-Free ABS, very safe, it can provide you with a reliable source of pure drinking water at any time and anywhere. Especially in an emergency. You can use it directly in the river, stream, lake. Configure extension straw, so you also can connect it with water bag, bottle and tubes to drink clean water. (Note: Sea Water, Carbonated Beverages, Industrial Polluted Water can not be filtered.) Advanced Membrane Technology - With ultra filtration membrane, the straw water filter has a filtration accuracy of 0.01 microns, compared to the 0.1 micron filter straw on the market, our 0.01micron pore size filter straw maintains the optimum flow rate while maintaining the filtration accuracy and can ensure your drinking water safety. Removes various of metal substances, eliminates strange smell in water, no chemical smell. Advanced 5-Stage Filtration Technology - The Filter has 5-stage safe technology filtration system including pp cotton, high iodinated resin, coconut shell activated carbon, removes greater than 99.9999% of all bacteria and 99.9999% of all protozoa cysts, harmful substances, microplastics, tiny material, ilt, sand, particulates, cloudiness, sediments and improve the taste. Ensuring the safest water in the worst environments. Portable Easy To Use and Long Life-Span - Special Bottom Design, The bottom of our water filter is designed with a thread, which can be used for beverage bottles with international standard mouths, and can also be connected with a silicone tube for your convenience. This straw filtration at only 8.78" long and 65g, fits in the palm of your hand, pocket, gym bag, backpacks and survival packs. Long lifespan ensures it provides up to 1500 liters (330 gallons) of drinking water. Survival Gear for Any Adventures -This water purifiers are essential items for anyone who likes to spend time in the outdoors, If you want to obtain healthy drinking water simply and quickly, you can use this survival gear. The filtering system is ideal for hiking, camping, mountain climbing, hunting, trekking, backpacking, biking, boating and wilderness adventures. A good companion for emergency preparedness. Your kit can never be too prepared.