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
    It’s so small!

    Posted by Alan Carpe on May 15th 2023

    Fits perfectly in my max position pouch. I haven’t used it yet but I’m sure I’ll love it when I do.

  • 5
    Compact survival...

    Posted by GH on Jan 17th 2023

    The sidekick straw is very light, compact and easy to use.

  • 2
    Hard to suck!

    Posted by Regan Courtney on Dec 19th 2022

    I have used a few filter straws, although none as small as this. I think because it's so thin it's very hard to get a decent mouthful of water, even when sucking very hard. It would take a lot of time & effort to quench your thirst using this straw. I tested it with tap water first & this is what I am basing my review on, once the filter gets clogged up with impurities I imagine it will be even harder?

  • 5
    Highly recommend.

    Posted by Steve R. on Oct 12th 2021

    Very compact and ingenious design. Carry it with me as part of my edc kit. Very impressed with its ease of use. Much easier than other similar devices.

  • 5
    The Best ultralight giver of life... No more...

    Posted by Darren Barton on Jul 24th 2021

    Hydroblu Sidekick... My new fastpacking, trail running, sportwalking buddy. I can rehydrate from a trickle, puddle recess in a rock etc, either directly or with no effort using the soft cup to scoop with

  • 5

    Posted by Aidan Slosser on May 4th 2021

    This water filter is good.

  • 5
    Less trash!

    Posted by Khobie Alexander on Mar 29th 2021

    I love that it has small replacement filters so you don't have to replace the entire straw! Much less trash and more compact!

  • 5

    Posted by Nathaniel Baer on Jan 20th 2021

    A very compact system with high filtering capacity.

  • 5
    Sidekick 3-Stage Straw Water...

    Posted by Sean on Jan 12th 2021

    Sidekick 3-Stage Straw Water Filter

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