GRAYL Quest Travel Water Purifier Removes 99.9999 percent of viruses (e.g. Hepatitis A, SARS, Rotavirus); 99.999 percent of protozoan cysts (e.g. Giardia); and 99.9999 percent of disease-causing bacteria (e.g. E. coli, Salmonella). Filters many chemicals (e.g. chlorine, iodine) and heavy metals (e.g. lead, arsenic) that affect health, flavor and odor Suitable for international travel, hiking, camping, canoeing, fly fishing Produces 16 ounces of clean fresh water in just 30 seconds (1 liter/minute) without the use of chemicals System includes: outer cup, inner cup (press), flip-lock lid, and replaceable Travel Purifier.