Clean, Safe Water. Made Simple.
The Sidekick 3-Stage Straw Water Filter is built for the moments when you need dependable water fast—without slowing you down.
Lightweight, compact, and easy to use, Sidekick delivers advanced 3-stage filtration in a streamlined design that fits easily into your pocket, daypack, running vest, or emergency kit. Whether you’re hiking, trail running, camping, traveling, or preparing for the unexpected, Sidekick gives you confidence to drink from questionable water sources with less worry and less hassle.
No pumping. No bulky setup. Just clean, safe water wherever adventure takes you.
Advanced 3-Stage Filtration. Simplified.
Sidekick combines three layers of filtration to improve both water safety and drinking experience.
Stage 1: Sediment Pre-Filter
The cotton pre-filter helps block larger particles and sediment before they reach the main filtration system, extending filter life and improving performance over time.
Stage 2: Activated Carbon
Activated Carbon helps reduce:
- Chemicals
- Heavy metals
- Chlorine
- Pesticides and herbicides
- Bad taste and odors
The result:
Cleaner, fresher-tasting water you’ll actually want to drink.
Stage 3: Hollow Fiber Ultrafiltration
The hollow fiber membrane uses microscopic pores (0.1 microns) to help protect against harmful bacteria through advanced size exclusion technology.
Helps protect against:
- 99.999% of harmful bacteria
- Contaminants commonly found in backcountry and questionable water sources
Ultralight & Adventure Ready
At only 2 ounces, Sidekick is designed to go anywhere without adding unnecessary weight or bulk.
Perfect for:
- Hiking
- Backpacking
- Trail running
- Backcountry skiing
- Camping
- Travel
- Emergency preparedness
Slip it into your gear and forget it’s there—until you need it most.
Built for Simplicity & Dependability
The Sidekick is designed to make safe water easier in real-world conditions. When the pre-filter and Activated Carbon filter reach the end of their lifespan, they can be quickly replaced using the included replacement end cap filter.
Simple maintenance. Dependable performance. Long-lasting confidence.
Because clean, safe water should never feel complicated.
Product Weight: 1 oz.
FEATURES & BENEFITS
Advanced filtration helps protect against harmful bacteria including Giardia, E. coli, and Cryptosporidium—giving you dependable hydration from questionable water sources.
Activated Carbon filtration helps reduce heavy metals such as lead, iron, cadmium, nickel, chromium, and zinc for cleaner, better-tasting water.
Helps reduce chlorine, pesticides, herbicides, gasoline, diesel fuel, and unpleasant odors so your water tastes fresher and more enjoyable to drink.
Perfect for camping, backpacking, hiking, scouting, travel, and emergency preparedness without adding unnecessary bulk to your gear.
Weighs only 1 oz. so it fits easily into pockets, daypacks, hydration vests, and emergency kits.
Dimensions: 0.7" wide × 6" tall for dependable filtration that’s always within reach.
Manufactured by HydroBlu
42 Reviews Hide Reviews Show Reviews
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Less trash!
I love that it has small replacement filters so you don't have to replace the entire straw! Much less trash and more compact!
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As...
A very compact system with high filtering capacity.
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Sidekick 3-Stage Straw Water...
Sidekick 3-Stage Straw Water Filter
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Great emergency filter for...
Love these small filters. Perfect for edc or vehicles
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Super...
These are perfect, small, compact and super lightweight.
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Haven't used yet, but love Hydroblu products!
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!
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We love...
Second one I've purchased. Love the small size very handy.
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Packed away for future...
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.
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Sidekick
Perfect for camping/ travel. Great size
