GRAYL Quest TRAIL Water Filter 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 System includes: outer cup, inner cup (press), flip-lock lid, and replaceable Trail Filter (lasts 300 uses, 40 gal / 150 l)