4.81/5 (71,000+ Happy Customers)
PUREFLOW™ Emergency Water Filter Straw (400 gal)
Clean drinking water whenever you need it most. Whether during emergencies, travel, camping, or unexpected situations, PureFlow™ keeps you prepared anywhere, anytime.
- Works during outages and emergencies
- Filters out 99.99% of contaminants
- Ultra-lightweight & fully portable
- Delivers up to 400 gallons of clean water
- Never expires. Reliable forever.
LOW STOCK WARNING
Sold Out 3x This Year - Next Restock August 1, 2026
Ava M., 34
This was a no-brainer for me. Something that could end up saving my family’s life. I bought one for every member of my family, plus a few for my parents and close friends. Hopefully we never have to use them, but it gives me peace of mind knowing we’ll always have access to clean drinking water no matter what.
An Entire Water Filtration System In Your Backpack
Everything you need to source, filter, and store clean drinking water in one compact setup. Simple, reliable, and ready whenever you need it.
How PUREFLOW™ Works
Step 1
CONTAMINATED WATER
3 ways to use it: drink directly from rivers, lakes, or streams, attach it to a standard water bottle, or use the squeeze bag for hands-free filtration.
Step 2
MICRO-PORE FILTRATION
Ultra-fine 0.1-micron hollow fibers block bacteria, parasites, microplastics, sediment, and contaminants while allowing cleaner water to pass through.
Step 3
CONTAMINANT CAPTURE
Contaminants are trapped on the filter membrane, preventing them from passing through. Only filtered water flows to the mouthpiece.
Step 4
PURIFIED WATER
Clean drinking water flows instantly as you sip. No charging, replacement parts, or waiting—just reliable filtration.
What Families Like Yours Are Saying
Brian C.,
47
Verified Buyer
When Hurricane Helene knocked out power for 6 days, our water turned brown and undrinkable. Stores were wiped out and bottled water disappeared fast. I had two emergency filter straws in our kit and they kept my family hydrated using water from our neighbor’s pool. My kids never went thirsty while others were searching everywhere for water.
PUREFLOW™ Filter Straw
$39.00 $55.00
Purchased on April 11th, 2025
Michael R.,
52
Verified Buyer
Texas freeze, February ’21. Power was out for 4 days and water pressure disappeared by day two. I kept one of these in my truck and used it with melted snow and stored water from the house. Easily one of the smartest emergency purchases I’ve made.
PUREFLOW™ Filter Straw
$39.00 $55.00
Purchased on February 2rd, 2025
Daniel S.,
41
Verified Buyer
One thing I hated about emergency supplies is that everything expires or needs replacing. What I like about these filters is you can store them long-term without worrying about rotating supplies. It’s reassuring knowing we’ll always have access to clean drinking water if we ever need it.
PUREFLOW™ Filter Straw
$39.00 $55.00
Purchased on March 19th, 2026
Chris T.,
58
Verified Buyer
After everything that happened during COVID, I started taking preparedness more seriously. This was one of the first things I bought. Small investment, but having a backup way to filter drinking water gives me real peace of mind.
PUREFLOW™ Filter Straw
$39.00 $55.00
Purchased on December 17th, 2024
Jennifer M.,
49
Verified Buyer
The power went out for 5 days after the storm. No water, no stores open, nothing. This little filter kept me and my elderly parents hydrated the whole time. I ended up ordering more for the rest of my family after that.
PUREFLOW™ Filter Straw
$39.00 $55.00
Purchased on January 1st, 2025
60-DAY GUARANTEE
PUREFLOW™ is designed to provide reliable water filtration whenever you need it most, backed by our 90-Day Money-Back Guarantee. If you’re not satisfied with your order for any reason, simply contact our support team and we’ll make it right promptly and professionally. We stand behind every PUREFLOW™, because your preparedness matters.
GET YOURS NOW
100% Satisfaction
Secure Shipping
Easy Returns
60-DAY GUARANTEE
PUREFLOW™ is designed to provide reliable water filtration whenever you need it most, backed by our 90-Day Money-Back Guarantee. If you’re not satisfied with your order for any reason, simply contact our support team and we’ll make it right promptly and professionally. We stand behind every PUREFLOW™, because your preparedness matters.
GET YOURS NOW
100% Satisfaction
Secure Shipping
Easy Returns
Frequently Asked Questions
Why not just boil water?
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While boiling works, it’s not practical in most emergency or outdoor situations.
It requires fuel, time, a heat source, and a container — resources you may not have when seconds count.
PUREFLOW™ provides instant drinking water with zero setup.
Plus, boiling doesn’t remove physical contaminants or microplastics like advanced filtration can.
What does the 0.1 micron filtration help filter?
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PUREFLOW™ uses an advanced 0.1-micron hollow fiber membrane that removes:
- 99.999999% of bacteria (E. coli, Salmonella, Cholera, Typhoid, etc.)
- 99.999% of parasites (Giardia, Cryptosporidium, Amoebas)
- 99.999% of microplastics
- Dirt, sediment, and turbidity
- With our activated carbon stage: chlorine, bad taste/odors
Will it expire if I just keep it in my emergency kit?
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Absolutely no shelf life or expiration date when stored dry.
PUREFLOW™ can sit in your emergency bag, vehicle, or home for years and be ready when you need it.
Just store it in a cool, dry place. If used, let it fully air dry before storing again to prevent mold growth.
How many should I buy for my family?
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We recommend following the prepper principle: “Two is one, one is none” - always keep a backup.
For a family of four or five, we suggest:
Minimum: 5 PUREFLOW™ filters (one each)
Recommended: 10 PUREFLOW™ filters (two per person) for backup and simultaneous use at water sources.
Can my kids use it?
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The PUREFLOW™ requires moderate suction, making it suitable for kids ages 5+.
For younger children or toddlers, use the squeeze bag attachment to filter water directly into bottles.
This flexibility lets the system work in multiple ways.
I live in the city/suburbs, do I really need this?
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Urban and suburban families are often at HIGHER risk. Why? You have zero alternative water sources and are 100% dependent on infrastructure that can fail instantly. Consider:
- Flint, Michigan water crisis - toxic lead for months
- Texas 2021 winter storm - millions without water for days
- Boil water advisories (2,000+ annually in the US alone)
- Hurricane Harvey - major city completely flooded
- Aging water infrastructure across America failing constantly
Rural folks have wells, streams, rainwater collection. City dwellers have...faucets that only work when the system works. When it fails, you're in the most dangerous position.
How do I clean and maintain it?
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1. Every 25-50 gallons (or when flow rate slows), backflush the filter using the included syringe
2. Fill syringe with clean filtered water, attach to outflow end, and forcefully flush backwards 3-5 times
3. This reverses water flow and ejects trapped particles from the membrane
4. That's it - flow rate restored to like-new
Between uses: Shake out excess water and air dry completely before storage to prevent mold. We include a protective cap to keep your mouthpiece sanitary.