Clearspring Emergency Water Filter Straw (400 gal)
The Clearspring uses a power-free, lab-verified, 4-stage micro-filtration system that turns rivers, lakes, and rainwater into safe drinking water for your family on the spot.
- Keeps working after the power grid goes down
- Eliminates 99.999999% of contaminants
- Never expires, protected for life
- Delivers up to 400 gallons of clean water
- Engineered & independently lab-tested
- Featherweight & pocket-portable
The Clearspring turns any freshwater source into safe, drinkable water in seconds — no power, no batteries, no chemicals. Just pure hydration from streams, ponds, pools, even rainwater.
Processing Time: 1–3 days.
Cost: 100% FREE. Once shipped, you'll get a tracking number so you always know where your order is.
Estimated Delivery: Most orders arrive 5–7 business days after hand-off to the carrier.
Need help? Email support@mildwell.com and we'll reply within 24 hours.
The One Thing Standing Between Your Family and Survival
The human body can last 3 weeks without food. But without water? Only about 3 days.
When disaster hits — hurricanes, grid failures, contaminated municipal water — bottled water sells out within hours. Shelves empty out. Neighbors fight over the last case. While everyone else scrambles in a panic, what will you do?
When Everything Fails, This Works
The Clearspring transforms any freshwater source into safe, drinkable water instantly. No power. No batteries. No chemicals. Just clean, life-saving hydration from streams, ponds, pools, even rainwater puddles.
While other families ration their last few bottles or risk illness from tainted tap water, you'll have unlimited access to clean water — anywhere, anytime.
Military-Grade Filtration That Actually Works
Our advanced 0.1-micron hollow-fiber membrane removes 99.999999% of waterborne bacteria, 99.999% of parasites, and 99.999% of microplastics.
This isn't a camping gadget — it's a survival tool built to the same standards used by emergency response teams and military units around the world.
Built for the Moments That Matter Most
Weighing just 2 ounces and small enough to slip into your pocket, the Clearspring filters up to 400 gallons — enough clean water to last your family for years. No shelf life. No expiration date. Just grab it and go when seconds count.
Perfect for your emergency kit, vehicle, bug-out bag, or outdoor adventures. Because the worst time to find out you're unprepared is when you're already in a crisis.
Don't wait until it's too late. The time to prepare is now — while you still can.
An Entire Filtration System In Your Backpack
Everything's included. Each component works together to source, filter, and store clean water in any situation. Simple, complete, and ready the moment you need it.
Clear, illustrated instructions that help you and your family use the Survival Straw with confidence.
Clip the system to your pack, belt loop, or bug-out bag. Keeps it accessible and ready to grab.
Collapsible water storage that packs flat and holds plenty for emergency hydration. Just screw it on and squeeze water through to filter.
Keeps your filter performing at peak capacity. A quick maintenance tool that extends filter life by clearing out debris.
Draws water from streams, puddles, or collection containers — so you don't have to get close to questionable water.
Most Common Threats…
All far too large to pass the 0.1-micron membrane: E. coli, Salmonella, Shigella, Campylobacter, Vibrio cholerae (cholera), fecal & total coliforms, aerobic bacteria clusters.
Why it matters: these are the most common causes of severe waterborne illness.
Blocked by size and cell structure: Giardia lamblia, Cryptosporidium parvum, Entamoeba histolytica, cysts, oocysts, protozoan larvae.
Why it matters: these cause long-lasting stomach illness and dehydration.
Common in lakes, rivers, streams, and even tap water: particles, fibers, fragments, beads, filaments, polymers larger than 0.1 microns.
Why it matters: microplastics now turn up in over 80% of natural water sources.
Trapped on the surface of the fibers: algae, biofilm, plant matter, decaying leaves, natural debris.
Why it matters: these affect both clarity and safety.
Physically removed by mechanical filtration: sand, silt, clay particles, rust flakes, soil residue.
Why it matters: these are present in nearly every outdoor source.
Reduces cloudiness and improves clarity: cloudiness, fine particles, suspended solids, murky-water impurities.
Why it matters: clearer water = safer hydration.
A broad category: worm eggs, larvae, nematodes, bacterial clusters, bio-contaminant fragments.
Why it matters: outdoor water often hides unseen biological threats.
Read What Our Customers Have To Say
Saved Us During the Blackout
When Hurricane Helene knocked out power for 6 days, our municipal water went brown and undrinkable. Everyone was fighting over the last cases at the store — shelves were empty. I had two Clearspring straws in my emergency kit and they literally kept my family of four hydrated using water from our neighbor's pool. My kids never went thirsty while others drove 2 hours just to find bottled water.
Finally Stopped Procrastinating
I'll be honest — I kept telling myself I'd prep "next month" for 3 years. Then our town had a boil-water advisory last spring and we had nothing. My husband boiled water on the grill for an hour just so we could brush our teeth. Felt like idiots. Ordered these the same day and now I keep one in each car and two at home. Haven't needed them since, but knowing they're there lets me sleep at night.
Grid Failed, We Didn't
Texas freeze, February '21. Power went out for 4 days and water pressure dropped to nothing by day two. Pipes were frozen anyway. I had the Clearspring in my truck and used it to filter melted snow and water from our hot-water heater tank. My two kids never knew we were in real trouble. Best insurance policy I never knew I needed until I needed it.
FAQ
Boiling works, but it's impractical in most emergencies. It requires fuel, time (at least 10 minutes), a heat source, and a container — resources you may not have when seconds count. In a wildfire evacuation or hurricane, there's no time to build a fire and wait. The Clearspring delivers instant, safe drinking water the moment you need it, with zero setup. Plus, boiling doesn't remove physical contaminants, heavy metals, or microplastics — our advanced filtration does.
Our 0.1-micron hollow-fiber membrane removes 99.999999% of bacteria (E. coli, Salmonella, Cholera, Typhoid), 99.999% of parasites (Giardia, Cryptosporidium, amoebas), 99.999% of microplastics, plus dirt, sediment, and turbidity. With the activated-carbon stage: chlorine and bad taste/odors.
No shelf life or expiration date when stored dry. The Clearspring can sit in your emergency bag, vehicle, or home for 10, 20, even 50 years and work perfectly the moment you need it. Just store it in a cool, dry place. (If you've used it, let it fully air-dry before storage to prevent mold.)
We follow the prepper principle "Two is one, one is none" — always keep a backup. For a family of four or five we suggest a minimum of 5 (one each), and recommend 10 (two per person) so everyone can drink at once if you reach a water source, plus a backup.
The Clearspring needs moderate suction, so it's great for kids ages 5+. For younger children or toddlers, use the squeeze-bag attachment to filter water straight into their bottles. That versatility is exactly why we designed the system to work multiple ways.
Urban and suburban families are often at higher risk. Why? You have zero alternative water sources and depend 100% on infrastructure that can fail in an instant — Flint's lead crisis, the 2021 Texas storm, 2,000+ annual boil-water advisories, Hurricane Harvey. Rural folks have wells, streams, and rainwater. City dwellers have faucets that only work when the system does. The Clearspring turns you from helpless and dependent into self-sufficient in seconds.
Every 25–50 gallons (or when flow slows), backflush the filter with the included syringe: fill it with clean filtered water, attach to the outflow end, and forcefully flush backwards 3–5 times. This reverses the flow and ejects trapped particles. Flow rate is 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.
We offer a 60-Day Risk-Free Trial and Lifetime Happiness Guarantee with our lifetime warranty. If you're not completely satisfied with the Clearspring within 60 days, return it for a full refund — no questions asked. Beyond that, we stand behind it for life: any manufacturing defect, and we'll replace it free. The only way you "lose" is by not having this when you need it.
Bought this to add to my bug-out bags. Haven't had to use it yet but the reviews were great. I think it's good value for the money. Hopefully I won't have to use it, but now I have a few in case the SHTF.
Well-packaged with clear instructions. I ordered them for my home and auto emergency packs. They'll take an earthquake or firestorm for me to use them.
This little straw is a wonderful gift for someone who has everything. It's an awesome way to get clean water if you don't have a bottle handy.
With all the natural and man-made disasters plus threats of civil unrest these days, it's important to be prepared if public water supplies get disrupted or contaminated. Also great for hiking or camping. I keep one in each vehicle.
A good addition to our hurricane-preparedness box, and hopefully we'll never have to use it. It's compact and includes everything needed.
Very glad I got this portable water filter for emergencies, camping, and prepping. It's about 6 inches long and slim — easy to carry in a pocket or purse and simple to use. Filters out toxic chemicals and harmful bacteria.
Don't Wait Until It's Too Late
Secure clean water for your family before the next crisis hits. Backed for life, risk-free for 60 days.