Long Lifespan: Even though the Water Filter Backpacking Straw is small in size, it boasts a 600-liter filter capacity so you can enjoy using it for more than a year! Best of all, the package includes two survival water filter so you always have a spare on hand. Multipurpose Use: Easy to carry and use, the LoGest Water purification Filter Straw survival gear and equipment can be used when traveling, playing sports, hiking water filter, camping water filter, engaging in outdoor work, during a natural disaster, for emergencies and so much more. Filter Purifier: Each water purifier survival Filter Straw is designed with a hollow fiber membrane to effectively remove 99% of harmful bacteria at 0.01-micron filtration. Fresh Water: Reducing the risk of infection by removing E. coli, legionella and salmonella, this water filter survival is designed to deliver fresh, pure drinking water. It’s also designed to reduce chlorine, harmful particles and bad odor to improve the taste. Compact Design: LoGest’s Prepper Supplies Portable Water Filter Straw measures 8” x 1” in size and is equipped with a carrying strap, making it life easy to transport from one location to the next so you can enjoy fresh drinking emergency water everywhere you go.