The ÖKO L3 filter

to survive in the wilderness

L3 ÖKO filter

Name: Filtre L3 ÖKO
Brand: ÖKO EUROPE
Price: 39 EUR
Availability: InStock

$39.00

The L3 ÖKO filtration kit is a compact, lightweight system designed to improve the quality of fresh water (rivers, lakes, springs) during hikes, camping trips, or emergencies.

Weighing only 58 grams, this hollow fiber filter offers a capacity of approximately 1,000 liters, provided it is rinsed regularly after each use.

Its 0.1 micron calibrated membrane retains particles of this size and larger, including bacteria (e.g., E. coli) and protozoa such as Giardia lamblia or Cryptosporidium, depending on conditions of use and laboratory tests.

Examples of results obtained in a COFRAC-accredited laboratory:

99.999999% filtration of Legionella pneumophila;
99.997% reduction in Salmonella;
No detection of E. coli, coliforms, enterococci, or Pseudomonas aeruginosa after filtration;

This filter can be used alone or integrated into an ÖKO water bottle for instant pressure filtration.

Specially designed for high-risk areas or isolated environments, the L3 is a suitable solution for travelers, hikers, and outdoor enthusiasts. It makes water safer to drink when its initial quality is uncertain, while respecting standard precautions and good filtration practices (choose clear, flowing water that is not stagnant).

Add a filter bottle to get the complete kit?

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📦 Fast delivery in 2 to 5 days

Shipping from our warehouses in France.

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🧪 Filtration tested in COFRAC laboratories

Our filters are tested by:

🔹Pasteur Institute of Lille

🔹IANESCO Laboratory

🔹Eurofins

➡ All these laboratories are COFRAC (French Accreditation Committee) accredited.

Result: ÖKO effectively filters out more than 200 pollutants and makes tap water cleaner than even the strictest drinking water standards. No more odors or tastes, and fewer contaminants and microplastics.

Visit our page Lab Test to find out everything you need to know.

💸 100% satisfaction guaranteed or your money back

You have 14 days to change your mind.

One-way return. Full refund, automatically.

No justification required.

➡ You can buy without any risk.

🇫🇷 French customer service

A team based in France (Couternon in Côte d’Or, available 6 days a week (7 days a week in 2026). Old-fashioned service.

You can:

– Write to us directly

– Call us (several numbers)

– Receive a response within 24 hours

➡ At ÖKO, there are no robots: real people based in France respond to your inquiries.

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🎁 10% off your next purchases

By ordering today, you will automatically receive 10% loyalty points that can be used on all your future orders.

➡ You will never pay retail prices again.

⭐ Real and verified reviews

We only display certified reviews via TrustPilot and Judge.me.

Our clients highlight:

🔹Filtration quality

🔹Reliability

🔹Customer service the old-fashioned way

🔹Value for money

💙 ÖKO supports Water.org

For every water bottle purchased, you help provide access to clean drinking water to a family somewhere in the world.

Water.org (Matt Damon & Gary White) has been active for over 30 years.

➡ Buying ÖKO also means supporting an essential cause.

Features of the L3 ÖKO ultra-filtering straw

High-performance filtration

Removes up to 99.997% of bacteria, parasites, and protozoa ≥ 0.1 microns in size without chemicals, ensuring better water quality.

Ideal for adventurers and travelers in high-risk areas

Designed for hikers, trekkers, and travelers exploring remote environments or areas with uncertain water resources.

High filtration capacity

Can be used with up to 1, 000 liters of water, offering great autonomy in natural environments. Up to 3,000 liters with rinsing after each use.

How do I use the L3 filter kit with an ÖKO water bottle?

The L3 ÖKO filter is compatible with the 650 ml and 1 liter ÖKO water bottles.

Simply insert the filter straw into the ÖKO water bottle instead of the L2 filter, and drink directly.

It can be used WITHOUT the bottle, as you simply need to immerse the filter in water and suck through the tube!

It becomes a backup system in case you lose your ÖKO water bottle!

The integrated filter system measurably reduces more than 200 pollutants. See the analyses (on the dedicated page) carried out by COFRAC-accredited laboratories (ISO/IEC 17025).

A revolution in the world of hollow fiber

Discover a unique innovation: one of the first water bottles equipped with a 0.1-micron hollow fiber filter that works with a simple press!

Direct flow, instant filtration, and optimal hygiene.

Every sip is more enjoyable, without effort or waiting.

Simple operation for everyday use by multiple people.

Comparison of ÖKO filters: L3 vs L2

L3 filter: The extreme solution

Technology

Hollow fibers calibrated to 0.1 microns (1/10,000th of a millimeter).

Performance

What is filtered: Bacteria, E. coli, microorganisms, parasites, protozoa, Giardia lamblia, Cryptosporidium, and other contaminants larger than 0.1 microns.

What passes through: Particles smaller than 0.1 microns.

Recommended for

Robust filtration for questionable water ortravel to high-risk countries.

Check our page on different countries and recommended filtration levels to find out whether the L3 filter will be sufficient or whether additional treatment will be necessary.

L2 Filter: Versatility for everyday use

Technology

Hollow fibers calibrated to 1.2 microns + electro-adsorption (technology developed by NASA).
Electro-adsorption: Attracts negatively charged particles even smaller than 1 micron (viruses down to 0.01 microns), providing ultra-fine filtration across a wide spectrum of contaminants.

Performance

What is filtered:Bacteria, viruses, pesticides, herbicides, E. coli, microorganisms, parasites, protozoa, Giardia lamblia, Cryptosporidium, chlorine, heavy metals, PFAS, disruptors, and certain particles even smaller than 1 micron (thanks to electro-adsorption).

What passes through: Particles not captured by electro-adsorption (mainly mineral salts)

Key advantage

Balanced filtration suitable for non-potable environments.

Recommended for

Balanced and tailored filtration for everyday use at the tap.

Filtration of non-potable water from sources with low to moderate sedimentationduring travel,hiking, or trekking.

Check our dedicated page to find out if the L2 filter will be sufficient for your trip.

Technical data

Filtration membrane pore size

0.1 micron

Size

Fits into an ÖKO 650 ml and 1000 ml filter bottle (2 tubes are provided)

Weight

Only 58 grams

Materials

ABS, UF, silicone

Water flow

Approx. 1 L/min and 1.5 m water pressure

Lifespan

Unused and stored in a dry place away from light: 15–20 years

Lifespan (after use)

2 to 3 years

Usage capacity

Up to 1,000 L (depending on water quality). Up to 3,000 L if washed after each use.

Our opinion on the L3 OKO filter kit

Validated and approved!

Jan Vansinte

Founder of ÖKO EUROPE

What do you think?

à travers le monde

merci oko de m’avoir suivi à travers le monde dans mon trip en stop
france-mongolie puis le népal (jusqu’à 4600m)et maintenant l’australie ou je suis sûr qu’a chaque instant l’eau que je bois est pure et je suis protégé de tous parasites

Gourde au top

Gourde très pratique dans toute circonstance. Je la recommande fortement

avis de christian

j’apprécie le produit ainsi que le service après vente suite à une mésaventure liée à ma dernière commande . Je recommande le site et les produits OKO

Vive l’eau filtrée oko

Partie au Guatemala, j’ai utilisé le filtre L3. Eau pure garantie dans ce pays où il fait soif ( chaleur tropicale). Et de nombreuses économies sachent que le quart de litre se vend entre 2 et 4€. Merci Jan !