SkyTeam member KLM has been working with Dutch brewery Heineken on a way to offer draft beer inflight.
This is a technical challenge. Most planes are pressurized to 8000 feet, and new aircraft like Boeing 787s and Airbus A350s to 6000 feet.
With less air pressure in the cabin than on the ground, it isn’t just taste buds that change. A beer tap will “only dispense a huge amount of foam” according to Heineken’s Edwin Griffioen.