Where to Buy
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Here's what other sites are saying:
For use with the MSR HyperFlow Microfilter - allows direct connection of the HyperFlow microfilter to the water bottle for hassle-free pumping. Or, use as a no-spill upgrade for your wide-mouth Nalgene bottle!
MSR HyperFlow Cleanside Cover
MSR HyperFlow Microfilter Cartridge Replacement
Sawyer Water Filter Squeeze Pouch
$7 - $9
Katadyn Hiker/Hiker PRO/Base Camp Replacement Element
Katadyn Micro Replacement Cartridge
$21 - $44
SteriPEN Pre-Filter Replacement Cartridge
Katadyn Exstream Cyst Filter
$15 - $19
Katadyn Drip TRK Filter Small Parts Kit