Seychelle Extreme Water Filter Bottle Replacement - Removes Cryptosporidium, Giardia, Virus, Radiological - 28 oz REPLACEMENT WATER FILTER - for 28 oz Seychelle bottles or Seychelle portable water pumps. FILTERS DOWN TO .2 MICRONS - The only product on the market that provides up to 100% reduction of known radiological contaminants. PERFECT FOR CAMPING AND OUTDOORS - Drink from any freshwater source around the world at any time. EMERGENCY PREP - Designed to be used anywhere disaster strikes. Essential for emergencies, earthquakes, floods, hurricanes, fires and radiological catastrophes. UP TO 100 GALLONS of safe water  Filters MADE IN USA  BPA FREE