The Nalgene Epic Water Filter fits perfectly into my existing Nalgene and allows me to drink clean water at home, at the office, while I travel, even in the backcountry. It is one of the most ...

Each filter has a replaceable filter cartridge that is good for 75 gallons of clean water or about four months of daily use and is compatible with all 32- and 48-ounce Wide Mouth and 24oz On-the ...