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Because the penetration of Ultraviolet (UV) light can be limited by debris, it is important that water be clear prior to SteriPEN treatment. Threaded for screw-top connection to the top of your Nalgene water bottle, the SteriPEN Water Bottle Pre-filter easily and efficiently removes particulates and debris, allowing the UV light of your SteriPEN to effectively treat water.
- Removes particulates and debris prior to SteriPEN treatment.
- Threaded compatibility with standard wide-mouth 32 oz. Nalgene bottle.
Likes: Fits standard nalgene bottles. Mine weighed 1.47 oz. Seems to be effective at filtering out the big particles that could interfear with your SteriPEN's UV death rays. I thought my hand was going to freeze while holding the bottle under some snow melt stream water.
Dislikes: Slow to fill a nalgene bottle. A little bulky.