Sidekick Activated Carbon Replacement 4 Pack


(11 reviews) Write a Review
Adding to cart… The item has been added

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.

This pack includes 4 replacement activated carbon cartridges.

Product Weight: 1 oz

Warranty Info


  • 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: 0.7" wide x 0.3" tall

Manufactured by HydroBlu

11 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Xwing15 on Jun 25th 2023

    Great replacement pack?

  • 5
    A very small water filtration straw; very...

    Posted by Arthur Rogers on Feb 27th 2023

    I bought this product mainly for use in my small bugg out bag. It has an excellent 'shelf life' and so I only need to use it in an emergency. Being light weight it fits very snugly into my mini bug out /travel pouch. I am extremely pleased with it.

  • 5
    Ordered This By Mistake.

    Posted by Thomas on Apr 29th 2022

    So I ordered these because I thought they were refills for a different system. Totally my mistake. However, I must add that they are constructed as well as Hydroblu normally does. Excellent.

  • 5
    Simply amazing.

    Posted by Kalpesh Patel on Feb 12th 2022

    Love it so far. I have the Life straw and Sawyer mini which I can swear by. Gotta test this out on my next hike. fingers crossed.

  • 5
    Love these carbon replacement...

    Posted by Scott Conerly on Dec 20th 2021

    These filters definitely help with the taste of water and small enough to fit anywhere

  • 5
    Keep up my sidekick...

    Posted by dpriatna on Nov 18th 2021

    I have been using the Sidekick 3-Stage Straw Water Filter for a long time, in order to maintain healthy water quality for consumption, I only need to replace activated carbon if needed, practical, and easy to use.

  • 5
    Excellent little...

    Posted by Josh Frey on Feb 7th 2021

    Great little filter to throw in a small pack or pocket. Much better size than the other brands.

  • 5

    Posted by Scott Conerly on Dec 31st 2020

    Great filter replacement and easy to change out. !!

  • 5
    Glad to have backups!

    Posted by Nick on Jun 12th 2018

    I threw these in my bug out bag with the straw filter and now I am set!

Videos Hide Videos Show Videos