ÖKO Fresh economical isothermal filter flask

ÖKO Fresh isothermal filter flask (filter included)

ÖKO Fresh isothermal filter flask (filter included)

89,00 EUR

ColorBlue

Ideal for hot weather, in the office, on a hike, in the car, at the gym, on a trip, etc. etc.
Ultra-light: 192 grams
600 ml
Filter life: 378 liters
Filter and cap identical to the original ÖKO filter flask

Official partner, 13th Man and official OM hydrator!

100% satisfied or your money back

"At ÖKO EUROPE, our policy is 100% satisfied customers".

And because you have the right to change your mind, you have 14 days to inform us and receive a full refund, without having to justify yourself!

French laboratories

We called on the Institut Pasteur de Lille, the Ianesco laboratory and Eurofins to test the effectiveness of the ÖKO filter.

They confirm the initial tests: ÖKO filters efficiently. Visit our Lab test to find out all you need to know

Customer service based in France

Do you have any questions about your order?
If you haven't found the answer to these questions in our F.A.Q., please contact:

Send us a message via our page A question?
Call us on +33 (0)6 68 13 91 61 (Monday to Saturday, 9am to 6pm)

We'll get back to you within 24 h.

Free 3x payment (min €100)

Alma Pay is configured on the store to allow you (if you wish) to pay for your purchases in 3 instalments, free of charge, up to a limit of €2,000. Alma Pay isFrance's leading multi-installment payment system, used by 17,000 retailers (Natures & Découvertes, Printemps, Maisons du Monde...).

Order by phone?

Our French customer service is available to answer your questions on +33 (0)3 80 63 51 73

Real, verified opinions

All our comments are verified and cannot come from unknown sources or be falsified.

ÖKO supports Water.org (M. DAMON)

ÖKO EUROPE is a partner of Water.org, Gary White and Matt Damon's association which has been helping to improve access to drinking water around the world for over 30 years. When you buy an ultra-filtering water bottle, you change the life of a family at the end of the world.

Add a filtering gourd!

Add a spare filter!

An L3 Survival Kit?

Swig filter straw for emergency and survival situations

Only one filter to change

With the ÖKO water bottle, you benefit from a single filter to be replaced every 378 liters, with no expiration date.

Thanks to the ÖKO Counter mobile app, you can precisely monitor the amount of water filtered, so you know exactly when to replace the filter.

Filter tested & validated by Institut Pasteur de Lille

One of the few laboratories in France accredited and equipped to handle pathogenic viral and bacterial strains.

The Institut Pasteur, in 2025, confirmed the results of past laboratory tests: ÖKO effectively filters the viruses and bacteria tested if present in water (99.982% and 99.9993%).

Lab tests

Filtration, Freshness and Pleasure

Imagine enjoying fresh, healthy water after hours in the sun or after strenuous exercise.

With the ÖKO Fresh insulated water bottle, this pleasure becomes a reality, whether you're in the office, at the gym, traveling, in the wilderness or on the road.

This water bottle maintains the temperature of your water for 3 to 7 hours, providing thirst-quenching, healthy hydration.

Its high-performance filter removes up to 99.99% of laboratory-tested contaminants (if present in tap water) - bacteria, viruses, heavy metals, fluoride, PFAS, chlorine, microplastics and pesticide residues - guaranteeing ideal water wherever you go.

Revolutionary filtration technology

A direct legacy from NASA!

Thanks to an innovativeelectro-adsorption process, the ÖKO water bottle transforms water from any source into healthy drinking water.

This filter, based on technology developed by NASA, works like a contaminant magnet. It attracts and captures harmful elements in the water: viruses, bacteria, pesticides, heavy metals and even drug residues.

As the water passes through the filter, a field of positive charge surrounds each pore, attracting hazardous particles like a magnet. This advanced electro-adsorption filtration is preceded by 1.2-micron mechanical filtration and the use of powdered activated carbon.

The best flow rate on the market with the ÖKO water bottle

Unlike conventional filters, which use 0.1-micron pores and require suction, the ÖKO water bottle is distinguished by its 1.2-micron calibrated pores and patented electro-adsorption technology brought to us by NASA.

This unique technology delivers the best flow rate on the market (at equivalent filtration levels).

No need for forcing or vacuuming. Pressure filtration is intuitive, convenient and makes it easy to share filtered water, wherever you are.

Technical data

Technology

ÖKO's ultra-filtering bottle combines a unique alumina nanofiber technology, derived from the mineral pseudoboehmite, with mechanical filtration with medium-sized 1.25 micron pores.

Flow

Up to 10x higher than equivalent filtration systems (2 L / min)

Material

Polypropylene (PP5) - BPA-, phthalate- and harmless agent-free.

Maintenance

The gourd, pipette and cap (without filter) can be easily washed at room temperature with soap and/or water.
NEVER clean the filter or put it in contact with anything other than water (if you have to filter muddy water: rinse the outside of the filter with water).

Use

Cold or lukewarm water (up to 37 degrees). No hot or boiling water. Don't freeze the filter if it's wet, as expansion could damage the membrane and therefore filtration quality.

Bottle capacity

Available in 600 mL version

Filter life

Up to 378 L (with clear, low-sediment water). The more sediment in the water, the shorter the filter life.

Weight

190 grams (2x lighter than conventional isothermal water bottles)

Dimension

Height 26 cm

Diameter

75 mm

Included in the water bottle

Carabiner, nozzle cap and ÖKO filter

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What do you think?

De l'eau fraîche au top

Déjà possesseur d'une gourde oko dont je suis pleinement satisfait. J'ai acheté cette gourde oko fresh en prévision de mes vacances au soleil pour avoir des l'eau fraîche en plus d'avoir de l'eau saine. Après un petit désagrément avec le filtre et l'intervention du sav, j'en suis pleinement satisfait.
Le sav oko est vraiment réactif, et efficace.
Je recommande ! Et bravo oko pour vos gourdes que je ne quitte plus. Et votre relation client au top !

Au top

Habitant à la Rochelle je ne buvais pas l'eau du robinet avec toutes les produits qui s'y trouvent mais depuis mon acquisition OKO je peux enfin boire de l'eau du robinet et suis ravie. Concernant la gourde celle-ci est pratique j'ai mis 4 étoiles en raison d'une part que le rafraîchissement n'est pas flagrant et, d'autre part, la languette qui est autour du bec ne tient pas, je ne sais pas si c'est normal.

Gourde isotherme au top !

La gourde isotherme est vraiment pratique. Personnellement je l' utilise pour mes sorties en montagne. Un format compact, elle se case facilement dans un sac à dos. Maintenir la température de l'eau de la rivière, c'est un must ! A conseiller de toute urgence !