Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw
Eau Claire Portable Water Filter Straw

4.9/5 — Rated Excellent by 483+ Customers

Eau Claire Portable Water Filter Straw

This portable filter delivers what outdoor adventurers and emergency preppers actually need for safe hydration — a military-grade hollow fiber membrane refined over decades of filtration science, now engineered into a straw light enough to forget you're carrying it. Combined with a 0.01-micron pore size, backwashable design, and zero chemical dependency. Start drinking confidently from any freshwater source in seconds.

Clean water that your filter actually purifies — not just passes through.

  • 0.01-micron hollow fiber membrane

  • No batteries, chemicals, or replacements

  • Removes 99.9999% of bacteria & parasites

  • Third-party lab tested, EPA compliant

Removes 99.9999% of bacteria & parasites

Lasts 4,000 liters — no replacements ever

Ultralight at 1.83 oz — fits any pack or pocket
Limited Stock: Delivered by 18 March

Benefits

The Eau Claire Water Filter Straw is engineered for adventurers, hikers, and emergency preppers who need safe drinking water from any freshwater source — instantly, anywhere, with zero prep.

 

  •  99.9999% Bacteria & Parasite Removal – A 0.01-micron hollow fiber membrane physically blocks harmful pathogens, giving you clean water directly from streams, rivers, and lakes without chemicals or waiting

  •  4,000-Liter Filter Lifespan – One straw filters up to 1,000 gallons with no replacement cartridges, no ongoing costs, and no expiration date — built to last years of heavy use

  •  Ultralight & Multi-Use – At just 1.83 oz, drink directly from any source, thread onto standard 28mm bottles, attach an extension tube, or convert into a hands-free gravity filter system

  •  No Chemicals, No Aftertaste, Zero Prep – Unlike iodine tablets or purification drops, the hollow fiber membrane works instantly on contact — clean water in seconds, not minutes

  •  EPA Compliant & 3rd-Party Lab Tested – Every claim is verified by independent testing, so you know exactly what you're drinking and what's been removed before it reaches your mouth

Product Details

Product Details

 

Filter Type: Hollow Fiber Ultrafiltration Membrane 

Filter Pore Size: 0.01 Microns Absolute 

Filter Capacity: 4,000 Liters / 1,000 Gallons 

Weight: 1.83 oz (52g) 

Removes: 99.9999% of Bacteria, Parasites & Microplastics Chemicals Required: None 

Shelf Life: Unlimited 

Compatibility: Direct drink, 28mm threaded bottles, water pouches, gravity systems 

Maintenance: Backwashable — no replacement cartridges Certifications: EPA Compliant, 3rd-Party Lab Tested 

Material: BPA-Free 

Use Case: Hiking, Backpacking, Camping, Emergency Prep, Travel Package Contents: 2x Filter Straws, 2x Extension Drinking Tubes

How To Use

Step 01 — FILL YOUR SOURCE Submerge the bottom end of the Eau Claire straw directly into any freshwater source — a stream, river, lake, or filled water bottle. No scooping, no waiting, no prep needed.

 

Step 02 — DRINK DIRECTLY Place the mouthpiece to your lips and drink naturally. The hollow fiber membrane filters as you sip, removing 99.9999% of bacteria, parasites, and microplastics instantly on contact.

 

Step 03 — BACKWASH & STORE After use, blow air back through the mouthpiece to clear the membrane and extend filter life. Cap both ends and store anywhere — your pack, pocket, go-bag, or glove box. Shelf life is unlimited.

Shipping & Returns

Processing
All orders are processed within 1–2 business days (excluding weekends and holidays). Once your order ships, you'll receive a confirmation email with tracking info.

 

Shipping

Standard (USA) | 3–7 business days

Expedited (USA) | 2–3 business days

International | 7–14 business days

 

30 Day Money Back Guarantee!

We want you to love your results. If you're not completely satisfied with your Eau Claire Water Filter Straw, return it within 30 days of delivery — even if it's been used — and we'll get you a full refund. No stress, no hassle.

UP TO 50% OFF

30 DAYS MONEY BACK GUARANTEE

SALE ENDS TODAY!

Drink Clean Water Anywhere

Most water filters only remove bacteria — leaving viruses, parasites, and microplastics behind. Eau Claire is the only ultralight straw filter with a 0.01-micron hollow fiber membrane — removing 99.9999% of contaminants directly from any freshwater source, for clean water you can actually trust.

0.01-Micron Hollow Fiber Membrane

The heart of the Eau Claire straw is a tightly woven hollow fiber membrane with pores 7,000x smaller than a human hair — physically trapping bacteria, parasites, and microplastics before they ever reach your mouth. No chemicals. No heat. Just mechanical filtration that works instantly.

99.9999% Pathogen Removal

Unlike basic filters that only reduce contaminants, Eau Claire's ultrafiltration membrane removes 99.9999% of harmful bacteria and 99.9% of parasites on contact — meeting EPA standards verified by independent third-party lab testing. Clean water you can measure, not just trust.

Backwashable for Maximum Lifespan

Most straws clog and get thrown away. Eau Claire's membrane is fully backwashable — simply blow air back through the mouthpiece to flush trapped particles and restore full flow rate. One straw, 4,000 liters, years of reliable use.

Multi-Source Compatible

Streams, rivers, lakes, rainwater, or a filled bottle — Eau Claire works with any freshwater source. Thread it onto any standard 28mm bottle, attach an extension tube for hard-to-reach sources, or suspend it as a hands-free gravity filter. One tool, every scenario.

Backed By Science. Built For the Wild.

Created by people who understand real survival needs and real peace of mind — designed to deliver clean, safe drinking water from any freshwater source with hollow fiber technology that filters what your body actually needs to survive.

"Drank from a river, zero issues"

"Lightest, most important thing packed"

"Saved me on the trail"

"Whole family has one now"

"Clean water, no chemicals needed"

"Never leaving home without it"

"Works exactly as advertised"

Results You Can Trust

Real filtration from real science — contaminant removal rates, filter capacity, and pore size verified through independent lab testing and EPA-compliant standards.

Use Case Timeline

What You'll Use It For — Scenario by Scenario

One filter built for every situation you'll face outdoors — from your first day hike to a full backcountry expedition to a home emergency.

How To Use

A portable filter built for anyone who needs clean drinking water in the wild, on the trail, or when it matters most — ready in seconds, no setup required.
FILL YOUR SOURCE

Submerge the bottom end of the Eau Claire straw directly into any freshwater source — a stream, river, lake, or filled water bottle. No scooping, no waiting, no prep needed.
DRINK

Place the mouthpiece to your lips and drink naturally. The hollow fiber membrane filters as you sip, removing 99.9999% of bacteria, parasites, and microplastics instantly on contact.
BACKWASH & STORE

After use, blow air back through the mouthpiece to clear the membrane and extend filter life. Cap both ends and store anywhere — your pack, pocket, go-bag, or glove box. Shelf life is unlimited.

Try It Risk Free Today

They were skeptical too, until they drank from the stream...

See what one simple tool can do for your safety, confidence, and peace of mind on the trail. No chemicals. No heavy gear. Just one ultralight straw you'll never leave home without.

Real People. Real Adventures. Hear It From Them.

Real stories from everyday adventurers, hikers, and preppers who made the Eau Claire Water Filter Straw part of their gear and never worried about clean water again.

Frequently Asked Questions

Thoughtfully engineered with a 0.01-micron hollow fiber membrane to deliver clean, safe drinking water from any freshwater source — without chemicals, replacements, or complicated setup.

What does the Eau Claire Water Filter Straw actually remove?

It removes 99.9999% of bacteria, 99.9% of parasites, and microplastics down to 0.01 microns. This includes E. coli, salmonella, giardia, cryptosporidium, and other common waterborne pathogens found in natural freshwater sources.

Can I drink from any water source with this?

It works with any freshwater source — streams, rivers, lakes, and rainwater. It is not designed for saltwater or chemically treated water such as pool water or water containing heavy metals and pesticides.

How long does the filter last?

The membrane filters up to 4,000 liters (1,000 gallons) of water. Lifespan varies depending on water clarity — cleaner water extends it, heavily silted water shortens it. Backwashing regularly helps maintain full capacity.

How do I clean and maintain it?

After each use, blow air firmly back through the mouthpiece to flush trapped particles out of the membrane. This restores flow rate and extends filter life. Always store with both end caps on and never let it freeze while wet.

Does it fit standard water bottles?

Yes. The bottom end threads directly onto any standard 28mm bottle opening, which covers most common water bottles and hydration pouches. It can also be used with the included extension tube for hard-to-reach water sources.

How do I know when the filter needs replacing?

The most reliable sign is a noticeably reduced flow rate even after backwashing. If it becomes difficult to draw water through after cleaning, the membrane has reached its capacity and should be replaced.

Is this safe for kids and emergency preparedness kits?

Yes. The materials are BPA-free with no chemicals involved in the filtration process. It has an unlimited shelf life when stored dry, making it ideal for go-bags, emergency kits, and family camping trips.

Customer Reviews

Real feedback from people who made Eau Claire part of their daily routine and shared their experiences.
ONLY 14 LEFT IN STOCK: Ships by 15 March

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