Sawyer Products 0.1 Micron Water Filtration System, 2-Liter N/A Made in USA Gravity water filtration system for backcountry camping and emergency preparedness; includes 0.1 micron absolute filter and two 2-liter reservoirs for a 4-liter total capacity Removes 99.99999% of all bacteria, such as salmonella, cholera, and E.coli; removes 99.9999% of all protozoa, such as giardia and cryptosporidium Dispenses 2 liters of water in as little as 1.5 minutes; no residual chemical taste Housing material made from food grade ABS plastic is easily field maintainable; includes faucet adapter for a more thorough backwash when you get back home Backed by a manufacturer's limited lifetime warranty