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Removes 99.99% of waterborne bacteria (e.g. E. coli, Salmonella) and 99.94% of protozoan cysts (e.g. Giardia, Cryptosporidium);Filters many chemicals (e.g. chlorine, iodine) and heavy metals (e.g. lead, arsenic) that affect health, flavor and odor;Suitable for most outdoor water sources; perfect for hiking, camping, kayaking, canoeing, and fly fishing;Produces 16 ounces of clean fresh water in just 15 seconds (2 liters/minute) without the use of chemicals;Interchangeable / replaceable filter works with all GRAYL Water Filtration Cups