The H2Only 25 oz. water bottle from US Canteen has a built in Ionic-Adsorption Micro-Filtration system that removes toxic chemicals, detergents, pesticides, and agricultural waste, as well as dissolved solids such as arsenic, aluminum, zinc, asbestos, copper, lead, mercury, and chromium 6. It also removes dirt, sediment, E-Coli Bacteria, DDT, MTBE, Benzene, and Chloroforms, which can all be found in drinking water. The filter removes up to 99.99% of all pollutants in all tap water in every part of the world. Each filter lasts for 12 months of heavy use, about 100 gallons, without any special washing or care. You can buy the H2Only for $40.00 and extra filters for $15.00.