A quick processing of up to 2 liters per minute is made easy thanks to the Dual Piston Technology. You can choose to filter 2 liters per minute in Faster Flow mode or 1 liter per minute in Longer Life mode. In this process, a ceramic pre-filter is activated, which extends the lifespan of the fiberglass filter when dealing with heavily contaminated water. The water passes through three filtration stages to safely eliminate all harmful substances. The activated carbon ensures that unpleasant odors are eliminated and chemicals are reduced, the ceramic pre-filter removes particles and suspended solids, and the fiberglass filter retains bacteria and protozoa. The result: fresh and great-tasting water that you can trust without hesitation.