The Orinoco Water Purification System protects you from waterborne contaminants by combining the security of a water purifier with the convenience of a sports bottle. Fill the Orinoco with water, squeeze, and presto: purified water. Purification Resin destroys bacteria and viruses, such as Cholera, E. coli, and Polio. Removes 99.99% of pathogenic cysts, such as Cryptosporidium Giardia. Provides protection for 100 liters per cartridge. Holds 26 ounces. Comes complete with Virustat filter; an extra filter is recommended on longer trips. 11.5 inches tall, including drinking tube. Weight with filter (no water) 7.45 oz. White with black cap.