It weighs almost nothing, so I added one to each family go-bag. I like having another water option without taking up the space of another case of bottles.
HYDRA-X1 Emergency Water Filter Straw$39.00 
"Amazing"
HYDRA-X1 Emergency Water Filter Straw
#1
WATER-READY ESSENTIALCompact enough for every go-bag.
Selling out fast
Due to high demand, limited quantities available.
Trusted by 200K+ customerswho choose Fort Sentinel for backup water when it matters most.
90-Day Money Back GuaranteeThat's how confident we are in our product. If you're not thrilled, send it back and we'll refund your purchase, no questions asked.
See it in action
What does 0.1-micron filtration mean?
The hollow-fiber membrane is rated at 0.1 micron. It is designed to physically screen out sediment and many common waterborne microorganisms as water passes through. It does not desalinate saltwater or remove every dissolved chemical.
How much water can one filter handle?
The filter is rated for up to 400 gallons with proper use and cleaning. Actual lifespan depends on water quality, maintenance, and how often it is used. Cloudy or silty water can shorten filter life.
How can I use the water filter straw?
Drink directly from a suitable fresh-water source, connect the intake tube, attach the included water bag, or thread it onto a compatible bottle. Use the clearest available source and follow the included instructions.
Does it remove viruses, salt, or chemicals?
No portable hollow-fiber filter should be treated as a complete solution for every water hazard. This filter is not designed to desalinate saltwater or reliably remove viruses, fuels, pesticides, heavy metals, or industrial contamination. Follow local emergency guidance when water safety is uncertain.
How do I clean and store it?
Use the included syringe to backflush the filter with clean water after use. Let it dry fully before long-term storage, protect it from freezing after it has been used, and never force water through with excessive pressure.
What comes with the filter?
The kit includes the water filter straw, water bag, intake tube, cleaning syringe, carabiner, wrist strap, protective cap, and instructions.
What's the warranty?
Every order comes with a 90-day money-back guarantee. If it is not right for your kit, return it according to the return instructions.
Lauren J. ★★★★★I was skeptical such a small filter would actually be useful, but after testing it on a camping trip it worked exactly as expected. Knowing I have a way to filter water that doesn't need power gives me peace of mind for when things go sideways.
◆ 0.1-MICRON FILTRATION● UP TO 400 GALLONS◆ GO-BAG READY
When Stored Water Runs Short, Options Matter.
Compare reaching a water source with no way to filter it versus carrying compact filtration in your kit.
With Fort Sentinel
Without Portable Filtration
↔
★★★★★ Rated 4.8/5 based on +10,839 Total Ratings
Customer Reviews
HYDRA-X1 Emergency Water Filter Straw$39.00 
The bottle thread and water bag make it much more useful than a straw alone. Everything fits into one small pouch in my hiking pack.
HYDRA-X1 Emergency Water Filter Straw$39.00 
I keep stored water at home, but this gives me a backup if we ever have to leave quickly or the outage lasts longer than expected.
HYDRA-X1 Emergency Water Filter Straw$39.00 
The cleaning syringe and intake tube were the details I wanted. It feels like a complete little filtration kit rather than one loose piece of gear.
HYDRA-X1 Emergency Water Filter Straw$39.00
◆
90 Day Money-Back Guarantee
Build your kit with confidence. If the water filter is not right for your preparedness plan, return it within 90 days according to our return instructions for a refund.
ADD TO MY KIT✓ 100% Satisfaction✓ Fast Shipping✓ Easy Returns
Customer reviews
5.0 ★★★★★5 reviews
5(5)
4(0)
3(0)
2(0)
1(0)
Small enough that I bought one for the car and one for the go-bag.
08/18/2026The whole kit is compact, and the water bag makes it more practical than drinking straight from a stream.
08/16/2026Easy to pack and simple enough that everyone in the family understands how to use it.
08/12/2026I tested the setup before packing it. The bottle attachment and cleaning syringe are useful additions.
08/09/2026It takes almost no room in our emergency bin, which means it will actually stay packed.
08/06/2026