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  • FitsAll filter features a durable 40 x 40 micron screen that removes particulates larger than 40 microns from water while you fill your bottle
  • Just as the name implies, the filter fits nearly any size bottle on the market, from generic single-use plastic bottles to name-brand reusable bottles
  • Filter also enables the SteriPEN Journey, Classic and Traveler purifiers (sold separately) to be used with wide-mouth bottles in the inverted position for simple purifying
  • Rugged, flexible material allows the filter to stow away compactly and then snap back to shape when unpacked
  • FitsAll filter weighs 2.3 oz. (65g) and measures 3.7 x 3.5 x 2.8 in.


View all SteriPEN Water Filter Accessories

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Best Use Backpacking
Rated 5 out of 5 by from ALWAYS Pre-Filter First! Off-Road Safety Academy If like me, you need to source dirty water containing lots of particulate matter ("Crud"), it is a necessity to pre-filter the water prior to applying any type of water disinfection treatment. Nobody likes "crunchy" Crud in his or her naturally sourced drinking water. Yuck! With the SteriPEN Pre-Filter, your removal of Crud is EASY. With this ingenious device, you can easily source water from a tap, lake, pond, or stream. SteriPEN's Pre-Filter also makes it incredibly easy to use your SteriPEN to disable the genetic code of all the bad Critters that can be found in wilderness water sources. Simply remove the small pre-filter from it's bottle cap and place your SteriPEN down into the water. Many models of SteriPENs will seal against the bottle top's opening. This allows you to turn the bottle upside down and shake it during UV treatment. There you have it… No Crud and complete disinfection. With SteriPEN's Pre-Filter and use of any model SteriPEN, you have a genuine water disinfection "system" that is small, convenient, and trust worthy. Review by Bob Wohlers, Owner of Off-Road Safety Academy, at
Date published: 2015-08-01
Rated 4 out of 5 by from Good Filter for Aquamira Treatment This is a good gross particulate filter to use in conjunction with Aquamira, or a similar chemical water treatment. It is lightweight, easy to assemble, and easy to rinse out. The flow rate is good. It is soft and flexible so it is unlikely to crack or break. The filter cartridge is replaceable. The lower section can also be used separately as a funnel. I rate it four stars instead of five because the lower funnel section does not taper enough to fit into the mouths of Smart Water bottles, Platypus water bottles, or plastic soft drink bottles. The upper section will not fit into the mouths of many popular wide-mouth containers. I believe it does fit Nalgene bottles.
Date published: 2017-01-30
Rated 4 out of 5 by from I have a weird bottle and this works great! I have a really strange-mouthed bottle, and the fits all filter works great with it!
Date published: 2016-01-19
Rated 4 out of 5 by from Great addition to the SteriPEN Line This is a great addition to the SteriPEN products. Having a pre-filter on the bottle before trying to use the SteriPen helps insure that you are getting clean water. The wide mouth funnel is great for Nalgene style bottles. Just took a recent trip to Havasupei Falls in Northern AZ over the weekend. There was a protected spring in the camp ground but we were caught for several hours by flash floods on the hike out. It was reassuring to know that if push came to shove we could get clean water even in that situation.
Date published: 2013-09-11
Rated 4 out of 5 by from Steripen FitsAll FiltWorks as advertised Seems mechanically overbuilt and heavy for the purpose of filtering out organic debris and silt. With only a 40 micron diameter screen, it might not get out all biofilms, sediments, and silt. That being said, once assembled, it works well. Personally I would have preferred not a FitsAll filter, but a filter optimized for narrow mouthed (Platypus type) bottles.
Date published: 2012-05-15
Rated 5 out of 5 by from Great Prefilter This is the prefect prefilter. I only needed something that was going to make sure the chunks are out of my drinking water and this thing provides that in a compact, easy to use design. I love my steripen and now I love my prefilter.
Date published: 2012-03-03
Rated 4 out of 5 by from awesomeness Carry this in my chest waders, no heavy bulky water bottle, when I get thirsty, I pull out my trusty little plastic sandwich bag dip it in the cool river I am fishing and pull out my trusty steripen and walaaa, cold clean water without lugging it up the river!
Date published: 2016-08-27
Rated 5 out of 5 by from Great accessory Used this while hiking 10 miles on the Uwharrie Trail. Allowed us to pack lighter. Used with tablets instead of SteriPen . Had to use an additional cup to pour into the filter since the creeks were not very deep. Glad we purchased!
Date published: 2015-06-14
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Does this work with the Steripen Ultra?

Asked by: bethwizzy
The FitsAll Filter does work with the SteriPEN Ultra.
Answered by: REIservice
Date published: 2017-02-12
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