Get the floaties out of your water!
The SteriPen Pre-Filter is perfect for getting sediment, bugs, and other assorted floaties out of your water before you purify it with UV light, giving you clean, healthy water to drink just about anywhere. Fits perfectly onto a widemouth Nalgene bottle or any other 63mm-mouth bottle, including widemouth Klean Kanteens, Camelbak, and MSR bottles. The Pre-Filter also helps protect the bottle threads from contamination by untreated drops of water.
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Gets the floaties out!
Intended to be used with the SteriPen, not on its own. It is not effective against cysts, bacteria, or viruses.