The STANDARD Water Filter Bottle has the SeychelleTM Filtration System for contaminants, chemicals and heavy metals. Completely filters drinking water equivalent to 757 regular water bottles! Removes up to 99.99% of toxic chemicals, contaminants, and pollutants found in fresh water supplies including, but not limited to: Chemicals including Chlorine, Chloroforms, Radon 222, DDT, fluoride (up to 90%). Dissolved Solids and Heavy Metals including dirt, Arsenic, Asbestos, Lead, Mercury, Copper, Zinc, Aluminum, trihalomethanes, PCB, PCE, Chromium 6, and other detergents and pesticides. Parasites (Cysts) including Giardia and Cryptosporidium