Sidekick 3-Stage Straw Water Filter


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Whether you are hiking, camping, backpacking, or just need a solid backup water filter, the Sidekick 3-Stage Straw Water Filter by HydroBlu is your perfect adventure companion. The 3-stage water filter provides the most robust filtration of any straw style filter.

The easy to use Sidekick protects you from bacteria, chemicals and heavy metals.. Large sediment is blocked with the cotton pre-filter membrane, increasing the longevity of the filter. Nasty chemicals and heavy metals are adsorbed by the Activated Carbon Filter. Activated Carbon removes lead, iron, cadmium, nickel, chromium, and zinc along with chlorine, pesticides, herbicides, gasoline, and diesel fuel. Once the pre-filter and Activated Carbon filters have reached their life expectancy of 50 gallons, they can simply be replaced with the extra end cap filter which is included. Finally, the Ultrafiltration Hollow Fiber removes 99.999% of bacteria. Hollow Fiber is made of dozens of tubes that have microscopic holes (0.1 microns) that don’t allow bacteria to pass through, while allowing clean water through by size exclusion technology.

Regardless, if you are running on the trail or backcountry skiing the lightweight design of the Sidekick won’t slow you down as it only weighs 1 ounce. It can fit perfectly into your pocket, day pack, or emergency kit. No matter where you go it’s always better to take your Sidekick with you.

User Manual

Product Weight: 2 oz.

Warranty Info


  • Removes bacteria, such as Giardia, E coli and cryptosporidium
  • Removes heavy metals such as lead, iron, cadmium, nickel, chromium, and zinc
  • Removes chemicals such as chlorine, pesticides, herbicides, gasoline, and diesel
  • Perfect for camping, backpacking, scouting, hiking, and for emergency situations or emergency preparedness
  • Weighs only 1 oz.
  • Size: .7" wide x 6" tall

Manufactured by HydroBlu

39 Reviews Hide Reviews Show Reviews

  • 5
    Great emergency filter for...

    Posted by Scott Conerly on Dec 26th 2020

    Love these small filters. Perfect for edc or vehicles

  • 5

    Posted by dpriatna on Oct 26th 2020

    These are perfect, small, compact and super lightweight.

  • 5
    Haven't used yet, but love Hydroblu products!

    Posted by Amy on Sep 25th 2020

    This is my 3rd Hydroblu purchase. Love the filters, bottles, everything. This little guy is tiny! Came packaged well and can't wait to add it as a backup to my kit. Perfect for travels when you need "something extra" or something small. Hydroblu comes thru again!

  • 5
    We love...

    Posted by Brian Carrington on Jun 16th 2020

    Second one I've purchased. Love the small size very handy.

  • 5
    Packed away for future...

    Posted by Lewis on Apr 16th 2020

    Great looking products. Purchased 3 of them and like how it comes with an extra filter. Think it's better than life straw because it remove more.

  • 5

    Posted by Shane Marshall on Mar 24th 2020

    Perfect for camping/ travel. Great size

  • 5
    Filters out chemicals and heavy metals -...

    Posted by Ann Forrest on Nov 20th 2019

    I love the idea of a "straw" for the walk home if our west coast city is struck by a large earthquake. I'm delighted that HydroBlu has figured out how to filter out chemicals and heavy metals. Very important in an urban setting!

  • 5

    Posted by D. Lee on Nov 9th 2019

    Works better than expected! Will be carrying this around!

  • 5
    HydroBlu 3 Stage Water...

    Posted by derrick hollis on Oct 25th 2019

    This water filter is the most compact filter(I use the clip to attach to my undershirt when I'm at work, because it's so unobtrusive)that I have ever used. The pre filter, filter membrane and carbon filter truly is a wonder to behold. This makes my 6th filter I've purchased, im sure it won't be my last.

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