Answers to your questions

ÖKO product user manuals

Below you will 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

ÖKO filter bottle user manual

ÖKO TAP Water User 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 filtered water.

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

The majority of our users filter at home and on the go (office, school, sports, airport, gas station, etc.).

at friends' houses, etc., etc.).

100 L to 378 L: Rural water, i.e., water from rivers, lakes, and streams that is transparent to the naked eye.

Transparent does not mean that it is not loaded with things invisible to the naked eye.

The naked eye can see objects measuring 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.

Everything will ALWAYS depend on the water you will be filtering.

If it is clogged (with particles you cannot see), the pores will become blocked more quickly.

It's mechanical, and you'll feel it in the pressure exerted, which will be harder in these cases.

The strength of the filter is its ability to filter out pollutants that are invisible to the naked eye.

That's why it's also popular with hikers, trekkers, and travelers around the world.

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

Once again, it all depends on what is in the water that could clog the pores more quickly.

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

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

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

Be responsible and careful in all circumstances.

Does the ÖKO filter remove mineral salts and trace elements?

NO, the filter does not filter mineral salts and trace elements (dissolved salts).
Dissolved salts (calcium, magnesium, sodium, potassium, etc.) generally come from rocks and soils through which water flows, as well as from various human activities.

Once dissolved, salts dissociate into ions (e.g., Na⁺, Cl⁻, Ca²⁺), which makes them chemically integrated into the very structure of water.Given their size (less than 1 nanometer) and their chemical integration into water, removing dissolved salts requires specialized processes such as reverse osmosis.

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

This device costs between €5 and €30 online.

Why did you choose a plastic bottle body?

The plastic used in the ÖKO water bottle is food grade.

It is made of PP5 ( food-grade polypropylene).

It is recyclable and has a lifespan of several years (depending on how intensively it is used).

With the ÖKO filter bottle, only the filter needs to be replaced every 378 liters.

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

Is this really technology developed by NASA?

ÖKO filter technology was created and developed by the NASA in 2002 to filter wastewater aboard the International Space Station (ISS).

This is a spinoff, meaning a technology designed for space and then adapted for life on Earth, so that the general public can benefit from it.

The ÖKO filter bottle has even been featured on NASA's official spin-off website, due to the simplicity and accessibility of this innovation for everyone.

Can the water bottle fit into a bike bottle holder?

Yes, only the 650 mL bottle, and you need a Z-shaped bottle cage so that it doesn't rattle in the cage, as the bottle is thinner in the middle (for a better grip).

We can send you a photo of a model that is perfect for you via our customer service department.

Alternatively, you can attach it to your handlebars using a stencil, which you can find 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 different ÖKO bottle models (500 ml, 650 ml, 1 liter, insulated). You can customize your bottle according to your preferences, including adding a colored straw protector available on the accessories page.

What are the delivery times?

Have you just confirmed your order? How exciting!

You will receive an email from ÖKO EUROPE confirming your order. When your order is shipped, you will receive a tracking number so you can track your order at any time.

We ship your products as quickly as possible, within 24 to 48 hours. Delivery takes between 1 and 3 business days, depending on where the products are shipped 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 14-day withdrawal period after receipt. Simply send us an email to nathalie@okoeurope.com, or via the Contact tab on our website, and we will respond as soon as possible.

Warranty on the container and filter:

The water bottle must be tested within 30 days of purchase to be covered by the warranty in case of a problem. After this period, the warranty is no longer valid.

Everyday life with ÖKO

Here are the frequently asked questions we receive from ÖKO users.

How to activate your ÖKO filter?

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

Before use, 1 L must be passed through the filter to remove dust caused by packaging and conditioning (as with most new filters).

Afterwards, you can drink!

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

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

How do I know when to change the filter?

As a general rule, it is time to replace your filter as soon as you notice that the water is no longer perfectly clear, that his taste deteriorates or that the flow slows down.

To make your life easier, the free, ad-free "ÖKO Counter" app is available to help you keep track of exactly how many refills you've made. You can download it from the App Store or Play Store.

Can I filter fruit juice, soda, coffee, tea, or other liquids that are not fresh water with ÖKO?

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

You have probably seen videos where ÖKO EUROPE (or certain influencers with our permission) filters sodas. There is always a DISCLAIMER.

WHY US and not YOU?

Because we have to prove to you VISUALLY that ÖKO filtration is instantaneous as the water passes through the filter. If we only used clear tap water, you might doubt the instantaneous nature of the filtration process, as you would see NO visual difference.

Furthermore, from a distance, you cannot sense the immense difference in texture, taste, and the absence of smell.

So never try this at home, or you could irreparably damage your filter.

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

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

If the fresh water comes from a muddy puddle, rivers, streams, lakes, or non-potable springs, these are natural water sources: you can filter them if you have no other choice.

To be clear: NEVER intentionally add substances other than fresh water yourself!

The warranty against manufacturing defects will be void and you will not be able to obtain a refund or replacement at our expense.

Always be responsible and careful.

Always choose the most common and clearest water possible.

And if you have no choice, pre-filter the water using a cloth or other material to remove large particles that will quickly clog the pores of the filter, which is designed to filter WHAT YOU CANNOT SEE.

Can I add electrolytes?

Add electrolytes only after filtration.

Can seawater be filtered with the ÖKO filter?

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

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

Can the OKO TAP / ÖKO water bottle be used after a water softener?

Yes, ÖKO filters can be used after a conventional water softener.

However, there are a few important points to consider, especially if the softener operates with the addition of salt (sodium chloride).

Firstly, sodium levels must not exceed 200 mg/L, the limit permitted for drinking water in Europe, taking into account that the ÖKO TAP filter adds a tiny amount of sodium.

In addition, excessively salty water can reduce the filter's lifespan.

Does the filter have an expiration date?

NoThe membrane incorporates antibacterial ions around the pores, which prevents proliferation and decay. You can use it as long as you have not exceeded the corresponding liters for the types of filtered water.

If you will not be using it for several weeks or months, store the filter in a dry place away from light.

As soon as you reuse it: iron 1L to reactivate the charge fields and remove any dust that may have accumulated during storage.

Is the water temperature compatible with ÖKO?

From 5 degrees to 37 degreesYou can therefore put it in the refrigerator (not the freezer).

In sub-zero temperatures, the water in the filter will expand and may damage the 400 pores that make up the membrane. When outdoors, be sure to put it in your backpack so that the water does not freeze.

I filtered hot water. Is that a problem?

A few seconds: no problem.

Longer: the filter may be damaged → it is recommended to replace it.

Can you take the ÖKO water bottle on a plane?

Yes, by passing it through security EMPTY. Then fill it up at the sink in the airport restroom. You'll save a lot of money by avoiding buying PET1 plastic water bottles, which are very expensive in these places.

What should I do with the used filter?

Once the filter has fulfilled its purpose, simply separate the membrane from its PP5 receptacle, place the former in the general waste bin and the latter in the yellow bin for recycling.

How should I care for my ÖKO water bottle?

All parts can be unscrewed or removed.

The filter cannot be cleaned; contaminants are trapped inside the filter membrane.

UNLESS you have had to filter mud, in which case you can rinse the outside with tap water to remove any particles of dirt or other debris, which will extend the life of your filter.

All other parts should be washed regularly in cold or lukewarm water.

A user manual is provided with every ÖKO water bottle!

Wipe the outside of the bottle thoroughly, especially the screw thread and base, to prevent limescale deposits that make your bottle look dirty.

By following these recommendations, your water bottle will last for many years.

How do I clean the L3 filter?

Unscrew the L3 filter from the water bottle so that you can attach a bottle of clean water to the threaded connection on the L3 in order to send the clean water in the opposite direction to perform a backwash.

I received a joint. How do I position it?

Position the gasket at the base of the screw thread on the bottle body.

Why add a Micropur tablet in certain countries?

In some countries, it is necessary to add a Micropur tablet as a precaution due to the presence of certain viruses and bacteria not found in Europe. Read the dedicated page.

Using the ÖKO water bottle abroad or while trekking

Frequently asked questions before making a purchase

Discover our page dedicated to use while traveling, trekking, hiking, and abroad.

Filter customer reviews according to your future destination ("Filter by") to see what they say.

Use of the website

Here are some difficulties that 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 took advantage of the feature that allows you to place an order without creating an account on the site. Try creating your account using the same email address you used for the order, and you will find all your orders.

I can't log in to ÖKO Counter

Please note that the ÖKO EUROPE account and the ÖKO Counter mobile app account are different and are not linked. This means you can have two different email addresses or two different passwords!

You also need to create an account on the mobile app in order to use it.

Please note that if you forget your password on the mobile app, the email to reset your password may end up in your spam folder. Be sure to check there.

I can't use a discount coupon.

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

What is a pre-order?

Pre-order is an ordering option for our customers who wish to reserve an item prior to its official release date, and it also allows our customers to take advantage of an attractive promotion.