Platypus Meta Bottle Replacement Microfilter Upgrade: add to the Platypus MetaBottle to use as a microfilter Fast: Filters up to 2L/minute Long-lasting: hollow fiber filter back flushes with a shake and lasts for 1,000 liters! Can be used with the 0.75L or 1.0L MetaBottles Effective: Meets all EPA and NSF guidelines for the removal of 99.9999% of Bacteria & 99.9% of Protozoa