Pinty Emergency Water Filter Straw to 0.01 Micron - 99.9999% Purification Ultrafiltration Membrane (Military Green) Easy access to clean and safe drinking water anywhere. Ideal for survivalists and campers. Upgraded filtering materials: 0.01 microns membrane, micro-fibrous tubes, activated carbon and high polyiodide that remove 99.9999% of bacteria, parasites and other contaminants. Filters up to 530 Gal of water. High flow rate. Long lifespan. Ultra-light and portable: only 1.65 oz and 7 inches long, making it much more convenient than a pump filter. No batteries required, and made without any moving parts that could break or wear out.