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ÖKO product manuals

Below you'll find the latest versions of the user manuals for the ÖKO ultra-filtering water bottle and the ÖKO TAP Water tap filtration system. Click on the image to download the document.
Click to download the ÖKO EUROPE user manual
Operating instructions for ÖKO filter bottles
Click to download the ÖKO EUROPE user manual
ÖKO TAP Water manual

Before using ÖKO

Frequently asked questions before making a purchase

How many liters can I make with an ÖKO filter?

It all depends on the filtered water.


378 L : Urban water, i.e. the water from our taps, where the majority of pollutants harmful to our organisms are potentially concentrated (chlorine, pesticides and metabolites, PFAS (eternal pollutants), heavy metals, drug residues, fluoride and sometimes E.Coli bacteria (when filtration plants go haywire).

The majority of our users filter at home and on the move (office, school, sport, airport, service station), 

at friends' etc etc).


100 L to 378 L: Celle rurale is water from rivers, lakes and streams that is transparent to the naked eye.

Transparent doesn't mean it's not loaded with things invisible to the naked eye.


The naked eye can see from 80 - 100 microns (1 micron = 1/1000 of a millimeter). Bacteria measure between 1 and 2 microns on average. 

Microplastics between 2 and 10 microns for example.


It ALWAYS depends on the water you'll be filtering. 

If it's loaded (with particles you can't see), pores will clog faster. 

It's mechanical, and you'll feel it when you apply harder pressure.


The strength of filters lies in their ability to filter pollutants invisible to the naked eye.

That's why it's so popular with hikers, trekkers and travelers the world over.


10 L to 200 L: For stagnant water (muddy puddles, sludge, etc.).

Again, it all depends on what's in the water that could clog pores faster.


If you have a choice: filter the clearest, most common water possible (tap or spring water).

If you have no choice, pre-filter to remove larger particles.


MORAL : there are trillions of "filterable" waters, and it all depends on the composition of the water you'll be filtering. 

Be responsible and careful in all circumstances.

Does the ÖKO filter remove minerals and trace elements?

NO, the filter does not filter mineral salts and trace elements (dissolved salts).
Dissolved salts (Calcium, Magnesium, Sodium, Potassium, ...) generally come from the rocks and soils through which the water flows, as well as from various human activities.

Once dissolved, salts dissociate into ions (e.g. Na⁺, Cl-, Ca²⁺), making them chemically integrated into the very structure of water. Given their size (less than 1 nanometer) and their chemical integration into the water, the removal of dissolved salts requires specialized processes such as Reverse Osmosis.

If you have a TDS device, which measures the quantity of minerals (conductors) present in the water, you should find the same measurement BEFORE and AFTER filtration with ÖKO. 

This device costs from €5 to €30 online.

Why did you choose a plastic bottle body?

ÖKO bottles are made from food-grade plastic.
It is made of PP5 (food-grade polypropylene) without BPA, phthalates or microplastics. 
It can be recycled and has a lifespan of several years (depending on the intensity of use).

With ÖKO filter bottles, you only need to replace the filter every 378 liters.

Stainless steel and glass are not suitable, as they are non-compressible and fragile.

Is it really NASA technology?

ÖKO filter technology was created and developed by the NASA in 2002 to filter wastewater on board the International Space Station (ISS).
This is a spinoff, i.e. a technology designed for space and then adapted to life on Earth, for the benefit of the general public.
The ÖKO filter bottle was even featured on NASA's official spinoff website, because of the simplicity and accessibility of this innovation for everyone.

Can the water bottle be fitted to a bicycle bottle holder?

Yes, only the 650 mL, and you need a Z-shaped bottle holder so that it doesn't rattle in the bottle cage, as the bottle is thinner in the center (for a better grip). 
We can send you a photo of a perfect model via our customer service department.
Alternatively, you can put it on your handlebars with a stencil found in any sports store or online.

Are my ÖKO filter and cap compatible with other ÖKO models?

Yes, ÖKO filters, bottle bodies and caps are fully compatible and interchangeable between the different ÖKO bottle models (500 ml, 650 ml, 1 liter, isothermal). You can personalize your gourd to suit your preferences, for example by adding a colored pipette cover available on the accessories page.

What are the delivery times?

Have you just confirmed your order? What a thrill!
You will receive an e-mail from ÖKO EUROPE confirming your order. Once your order has been dispatched, you will receive your tracking number, so you can follow your order at all times.
We ship your products as quickly as possible, within 24 to 48 hours. Delivery takes between 1 and 3 working days, depending on where the products leave from.

How many days do I have to request a refund if I don't like the product?

As with any product in Europe, you have access to 14-day cooling-off period after receipt. Simply send us an e-mail to nathalie@okoeurope.comor via the Contact tab on our website and we will deal with it as soon as possible. 

 Container and filter warranty : 
The bottle must be tested within 30 days of purchase to benefit from the warranty in the event of a problem. After this period, the warranty is void.

Every day with ÖKO

Here are some frequently asked questions from ÖKO users

How do you activate your ÖKO filter?

Simple and ultra-fast! All you need is a nearby water tap!

Before use, you need to run 1 L through the filter to remove any dust caused by packing and packaging (as with most new filters). 

Then you can drink!

Unscrew, fill, screw and press => your water will be of much higher quality for better hydration & recovery!

Remember to repeat this rinsing operation each time you change the filter.

How do I know when to change the filter?

As a general rule, it's time to replace your filter as soon as you notice that the water is is no longer perfectly clairethat its taste is deteriorating or that the slower flow. 

To make your life easier, the free, ad-free " ÖKO Counter " app is available to keep an accurate count of the number of fill-ups you've made. You can download it from the App Store or Play Store.

Can I filter fruit juice, soft drinks, coffee, tea or other non-soft water liquids with ÖKO?

NO, our filter is designed to filter ONLY SOFT water .

You've probably seen videos of ÖKO EUROPE (or certain influencers with our permission) filtering soft drinks. There's a DISCLAIMER every time.

WHY US and not YOU?
Because we have to prove to you VISUALLY that ÖKO filtration is instantaneous, as soon as the water passes through the filter. Because if we only put clear, fresh tap water through the filter, you might doubt the instantaneous nature of the filtration, since you'd see NO visual difference. 
What's more, from a distance, you can't smell the huge difference in texture, taste and odor.

So never reproduce it at home , or you'll damage your filter irreparably.

ÖKO EUROPE cannot be held responsible for any malfunction resulting from such unauthorized filtering.

You can use the bottle WITHOUT THE FILTER for fruit juice or your favorite beverage, but under no circumstances may you use the filter to filter other liquids other than ONLY fresh water.

If the fresh water comes from a muddy puddle, rivers, streams, lakes or non-potable springs, it' s water in a natural environment: you can filter it if you have no other choice.

To put it plainly: NEVER intentionally add anything other than fresh water yourself!
The warranty against manufacturing defects will be void and you will not be entitled to a refund or replacement at our expense.

Always be responsible and careful. 

Always choose the clearest, most running water possible.

And if you don't have a choice, pre-filter the water with a cloth or similar to remove the large particles that will more quickly clog the pores of the filter, which is designed to filter WHAT YOU CAN'T SEE.

Can ÖKO filter seawater?

No, the ÖKO filter is specifically designed to filter fresh water only.


If your water goes through a softener using salt (dissolved salts), please note that the ÖKO filter does not remove these dissolved salts. The choice of whether or not to consume this water depends on your personal preferences and convictions regarding mineral salts. You remain responsible for the final choice as to the quality of the water you drink.

Does the filter have an expiration date?

NoThe membrane is embedded with antibacterial ions around the pores, preventing proliferation and decay. As long as you haven't made up the correct bedding for the type of water you're filtering, you can still use it. 

If you're not going to be using it for several weeks or months, store the filter in a dry, dark place. 
As soon as you use it again: iron 1L to reactivate the charging fields and remove any dust caused by storage.

Water temperature compatible with ÖKO?

From 5 degrees to 50 degrees. You can therefore put it in the fridge (not the freezer).
In sub-zero temperatures, the water in the filter expands and can damage the 400 pores that make up the membrane. When outdoors, be sure to pack it in your backpack so that the water doesn't freeze.

Can I fly with the ÖKO flask?

Yes, by passing it EMPTY through the checkpoints. Then fill it up at the airport toilet sink. You'll save a lot of money by not having to buy PET1 plastic water bottles, which are very expensive in these places.

What to do with the used filter

Once the filter has done its job, simply separate the membrane from its PP5 receptacle, place the 1st in the refuse bin and the 2nd in the yellow garbage can for recycling.

How to care for your ÖKO water bottle

All parts can be unscrewed or disassembled.
The filter does not clean itself; contaminants are trapped inside the filter membrane.
EXCEPT if you've had to filter mud, you can rinse the outside of the filter with tap water to remove soil and other particles, which will extend the life of your filter.
All other parts should be washed regularly in cold or lukewarm water.
A user manual is included with every ÖKO water bottle!
Wipe down the outside of the bottle body, especially the screw thread and the base, to avoid lime deposits which make your bottle look dirty.
If you follow these recommendations, your water bottle will last for many years.

Use of the website

The following difficulties may arise when using our website

I can't access my ÖKO account / I can't reset my password

It is very likely that you have taken advantage of the feature that allows you to place an order without creating an account on the site. Try to create your account using the same email address as the one used for the order and you will find all your orders.

I can't connect to ÖKO Counter

Please note that the ÖKO EUROPE account and the ÖKO Counter mobile application account are different and not linked. You may therefore have two different e-mails or passwords!
You also need to create an account on the mobile application to use it.

Please note that if you forget your password on the mobile application, the email to reset your CDM may arrive in the spam folder. Don't forget to take a look.

I can't use a discount coupon

Our discount codes (excluding sponsorship rewards and special offers) are reserved for new customers and are for one-time use only.

Laboratory tests

Filtration technology

Filtering YOUR WATER away from home

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