Seven Questions for Kristof Retezár : Designer of the Fontus Bottle


Kristof Retezár is the man behind the Fontus bottle

He is an Industrial Designer from the University of Applied Arts, in Vienna, Austria.

His design won him a James Dyson award and has garnered much attention on the internet.

We had the opportunity to ask him a few questions about the Fontus bottle:

Fontus Logo

C: In short, What is Fontus?

K: Fontus is a self-filling water bottle.

It is a device you can mount on your bike and collect water from the air.


C: What inspired Fontus?

Where did the idea come from and what technology precedes it? 

(As far as I know there aren’t many other consumer products like it)

K: I wanted to work on the increasingly important water issue on our planet and try to develop possible solutions.
In my research I came across various different water purifying and collecting methods which brought me to the topic: water from the air.
I was surprised to find out how little development there was in this area and ironically, how much potential there is in extracting water from the air.
For me, the whole topic has a sort of magical touch.
You can barely see it, but there it is, hovering above our heads, huge amounts of unexploited, pure water.
And there are regions of this world where human beings die daily because they just don’t have access to it.
So I came up with some ideas and sketches.
Finally I got hit by this idea in my dreams, of having a bottle that would fill itself from nothing like a mythological magic mug.
At the time I had no idea how I would achieve that technically.
The principle of extracting water from the air is goes back more than 2000 years.
There are for example, so called air wells that condense fog. There are other similar approaches today already working.
Like fog fences in Lima and the water cone which is used in developing countries to purify water.
 Side view of the internal components of the Fontus.

C: What parts will need to be replaced?

K: No parts would need to be replaced in our actual model.
You might have to change the filter once in a while or just clean it.
Maybe the final prototype will have an extra battery but we are not sure about that yet.
 Fontus on a bike

C: Does the Fontus only work with a bike? If so, please explain.

(I’ve only seen it attached to a bike, I’m curious would it work on the dashboard or roof of my car?)

K: Fontus would work on any moving object.
But It has been specially designed for a bike as bikes are the most common and widespread means of transport in the World, especially in developing countries.
We also developed other products that don’t need a bike, are bigger in size and heavier but static.

C: If the Fontus was enlarged could it produce more water? 

I.E. Is it possible to make a “rooftop” Fontus for a house that could produce enough water for a shower? Or a building size Fontus that could irrigate an entire crop field? 

K: If you want to produce more water you need in the first place more energy.

Then you would also need more space/condensing surface.

A fontus that produces more water would rather need a more reliable and strong energy source.
Of course you could expand and adapt the system for other needs.


C: Is this project currently being crowd funded? Links?

K: We are currently considering crowdfunding. But haven’t decided yet.
We are also looking for investors or partners willing to support this project financially


C: When do you expect Fontus to be available to purchase?

K: I couldn’t say when it will be available.

We are planning a development stage and go into production as soon as possible.

There are many people already waiting for Fontus to be for sale!

 Early Development

C: Is there anything else you would like to add about the Fontus?

K: I would like to mention my current partner, an electrotechnician who helped me in the early stages of the development: Bojan Masirevic.

In an age faced by concerns over water shortage and the need for renewable resources, a self filling water bottle could be monumental.
Kristof has taken us forward in our search for sustainable sources of drinkable water.
I look forward to further developments.
Click any of the Images below to view all images on this page as a slideshow.

16 thoughts on “Seven Questions for Kristof Retezár : Designer of the Fontus Bottle”

  1. Pingback: Fontus: ¡Una botella que transforma el aire en agua!
  2. Trackback: Fontus: ¡Una botella que transforma el aire en agua!
  3. Elizabeth says:

    Sign me up!! You should reach out to the founder of 5 Hour Energy! This is right up his alley!! Great invention and best of luck! 🙂



  5. Debb says:

    Any update on release and would a hiker/walker be enough movement?

    1. ANDesign says:

      Hello Deb! The Fontus team has added a bottle specifically for hikers/walkers. Their IndieGoGo just went live! Check it out.


    I emailed ‘Wavesforwater’ about their plans to use Fontus as a stationary device. Their response was;

    “We are not at this time.
    Although, we are following the technology.

    Christian Troy
    Executive Director
    Waves For Water”

    So my question to you is what is required, including the timeframe, to bring a stationary unit to production for use in 3’rd world countries at a reasonable price?

    1. ANDesign says:

      Hello Daniel,
      I can’t answer that, unfortunately.
      Try reaching out to them on IndieGoGo:

      also, while you’re there consider backing the project!

  7. In this house we obey the laws of thermodynamics says:

    You can buy these peltier based dehumidifiers everywhere: -> This is exactly the same technology.
    From the product data you’ll see that the maximum yield is just 250ml per DAY in very humid air while consuming 22W. Thats over 2kWh for 1l of water.

    So the only important question would have been: “Are you kidding me?”

  8. werner says:

    great idea great application, may I suggest to develop watermaker for yachts based on this principle, the present osmosis watermaker technology is still very maintenance prone and high electric energy user!

  9. jj j says:

    it is a scam… clearly. that device cant pull more than 1 full shot glass of water in a best day, let alone give you enough water to do anything with it

    also it cannot have good enough filtration system either if it works with only tiny fan and weak filter like they show, you will end up with tiny shot glass 50ml of water full of road crap at the end of the day, if even that

    these despicable scam artists should get jailed

  10. Santiago Santos Cadavid says:

    I find it amazing this invention, and inspires me in my career, because currently am studying technology in Industrial Design at the Metropolitan Technological Institute in Medellin, Colombia. But I own a question which I could not find an answer and is: why Mr. Kristof Retezár decided to call his invention “Fontus”?, I wonder if someone can answer my question or if there is a possibility of direct contact with him, for a better approach and more context about this.

    Thank you.

  11. Koos says:

    Sounds like a great idea, but it is a total scam. Is anybody paying attention in high school physics at all?

  12. mikkajan says:

    Scam! no way this thing can make 500mL of water in an hour with a small solar panel like this. You’d need over 100Watt of power running 8 hours to even make 500mL of water! This os completely bullshit and it’s not even new! Peltier element has been around for decades.

    1. Cheyenne says:

      Call me wind because I am absuoltely blown away.

  13. Pingback: Financie isso: Fontus, a garrafa d’água que enche sozinha | Willianey Carvalho
  14. Trackback: Financie isso: Fontus, a garrafa d’água que enche sozinha | Willianey Carvalho
  15. christelle joy singua says:

    Hi sir, your invention is really useful. I just want to know , when did you invented this fontus bottle? I need it for my report. Thank you very much 🙂

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