Fontus: Self-Filling Water Bottle


An industrial designer in Austria, Kristof Retezar, made a new device that can pull dampness from the air and abbreviate it into drinkable water. It is developed to help people with clean drinking water more than 1 billion in water-scare areas. It is named as Fontus.

Fontus is a self-filling water bottle that collects wetness from the air, condenses it, and stores it in safe drinking water. Under the correct climate conditions, it can collect up to 0.5 liters of water in an hour.

Retezar said, “My goal was to create a small, compact, and self-sufficient device able to absorb humid air, separate water molecules, and store water in the form of liquid.”

Fontus, a self-filling water bottle, is getting crowd-funding treatment to ease mass production. It is being marketed as an exploit for cyclists who cover long distances and don’t have time to stop. Like that, it will also come with a bike attachment when it comes to the market to sell.

“This is simply the condensation of dampness contained in the air. You always have a certain percentage of dampness in the air; it doesn’t matter where you are or whether it may be desert. That means you would always potentially be able to pull out that dampness from the air.”

The device called Fontus consists of a solar panel, a condensing case line with hydrophobic surfaces, and a basic filter to keep dust, dirt, and bugs out of the mix.

Retezar said, “Because they are hydrophobic, they immediately repel the condensed water they created. So you get a drop to flow into the bottle. It simply means you are considering air in a vapor state and converting it into liquid.”

How does a Self-filling Water bottle work?

Fontus Self-Filling Water Bottle
Kristof Retezár

To get condensation, one must cool hot, humid air down. The water bottle has a tiny cooler, ‘Peltier Element,’ equipped in its center. It is divided into two sides: When charged up by electricity, the upper side gets cool, and the bottom side gets hot. The more you try to cool the hot downside, you will get the cooler the upper side. Both two sides are separated and isolated from each other.

When a bike moves forward at high speed, air enters the bottom case and cools the hot downside.

For example, when the air enters the upper case, it is stopped by little walls (drilled non-linearly) to reduce its speed and give air time to lose its water molecules.

The condensing structure shows the largest apparent in the smallest space possible, which provides a big apparent for condensation to happen. Lastly, droplets flow into a bottle through a pipe.


See stories of the future in your inbox each morning.