This Bottle Turns Air into Water as You Ride Your Bike

Most of the discussion is here: https://news.ycombinator.com/item?id=8541997 (distractify.com)

More discussion here: https://news.ycombinator.com/item?id=8606715 (grist.org)

Another submission: https://news.ycombinator.com/item?id=8595563 (citylab.com)