Replacement canister for award winning First Need Deluxe portable water purifier. Sealed canister prevents contact with contaminants. First Need Deluxe portable water purifier removes microbiological, chemical and aesthetic contaminants. Independently certified to meet EPA Microbiological Guide Standards for removal of bacteria, cysts and virus, First Need portable water purifier excels at removing herbicides, pesticides and other chemical contaminants as well as foul taste, odor and color. Self-cleaning prefilter and gravity assist system included. No chemicals means no iodine or iodine taste.