The Grayl Legend with Trial Filter purifies most outdoor water sources in only 15 seconds. The carbon core enhances taste and eliminates odor, while the flip lock lid allows you to grind with or without the lid. Fresh Tasting Water: Activated carbon core improves taste eliminates odor. Bacteria Protozoa Protection: Removes 99.99% of 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. Press Time: Makes fresh water in 15 seconds. Flip Lock Lid: Guzzle with or without a lid seal cup closed when on the go. Versatility: Compatible with all GRAYL interchangeable filters purifiers. Dishwasher Safe: Outer cup, inner presscup, and lid are top rack dishwasher safe.