1 With the bike-mounted version, the rider’s speed causes air to flow through a filter, which pulls out dust and dirt. (A stationary version relies on a fan for airflow.)
2 The air then travels through a cooling chamber, and water vapor condenses on a special surface designed to draw out moisture.
3 Water trickles into the bottle at a rate of up to half a liter per hour–though it varies according to air humidity, says Kristof Retezár, the project’s designer.
This appears in the April 25, 2016 issue of TIME.
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