It's actually the last bottle of its kind. It's called Reuse Brew and it was made from recycled water. We went to the wastewater treatment plant in Berlin to see the high-tech water cleansing project behind the beer in action.
To make the wastewater drinkable, the treatment plant partnered with a water technology firm called Xylem. Xylem makes this Ozone filter that actually produces ozone and introduces it into a controlled stream of wastewater.