NduR Flip Top Filtration Bottle with Clear/Black Cap, Clear, 28-Ounce Filter life: up to 100 gallons or more depending upon the quality of the source water Safest, most convenient, low-cost alternative to boiling, purification drops and bottled water Ideal for those traveling abroad in foreign countries Featuring Seychelle's Ionic-Adsorption Micro-Filtration (IAMF) Instant access to safe drinking water and is BPA-free plastic