This water bottle fills itself by pulling moisture from the air

Fontus, the self-filling water bottle Digital Trends covered last year, has evolved. It’s grown from a proof of concept into two different designs that look like finished products. And Fontus is now up on Indiegogo, so backers can grab a bottle that fills itself for the first time.

In case you didn’t hear when it made news back in July 2015, Fontus is essentially a condensation-gathering system. The idea is that you can have a full bottle of water without carrying it along or planning your routes around water access, making it great for the great outdoors.

The initial design strapped onto the top tube of a bicycle and relied on air flow from cycling to get air to pass into a dual-chambered, solar-powered Peltier element. Air pulled into this element condenses into water which drips into the attached bottle. This bike-friendly design is still in place, and is now called Fontus Ryde with the addition of an IP54 filter to keep out contaminants.

Related: 8UP is a water tracking bottle that is both practical and low-tech

In addition there’s a new Fontus version: a stand-alone bottle for those who make outdoor excursions without a bike. Called Fontus Airo, it uses a solar panel to power a fan that pulls humid air through the filter into the condensation chamber. The panel conveniently wraps around the bottle like a case when not in use. In both cases you can use capsules to remineralize the water, if you want.

One reader of the concept pitch (we’re looking at you Robert Winters) pointed out that keeping a survival straw on hand is an obvious fix if you’re in a situation where you may run out of water. That’s a great solution for those who are going to be near water or know how to find it in a survival situation. Those who don’t know how, or who don’t want to go through the trouble, have other options for filtering water, but none that pull it directly from the air while you do something else.

It’s important to note Fontus isn’t made for areas with significant air pollution, like some cities. An IP54 rating means the filters protect against dust and low-pressure jets of water — but that’s it. This is what you bring on extended journeys, hiking, camping, etc., not for your daily commute.

Related: Check off these items from your list for your next outdoor adventures

Also remember that the condensation isn’t spontaneous. It varies depending on the temperature and humidity of the air. The Airo pulls a little more than the Fontus over time; over the course of an hour, at 85 degrees (Fahrenheit) and 60 percent humidity, the Ryde will pull about 2-300ml or about six and a half to about ten ounces, while the Airo pulls 3-4ooml.

Such freedom isn’t cheap, however. Backers need to pledge at least $165 to grab a Fontus Ryde at the early bird level, while the Airo runs $250 for early-bird customers. The campaign has already drawn over $200,000 in backing, far beyond its $30,000 goal. Delivery to backers is expected in April 2017.

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