Walk-around of the helmet's feedport.
Picture 5 of 5.
If the spacecraft would have lost pressurization during the mission, the
astronauts would have donned their spacesuits for the remainder of the flight.
In order to eat or drink, the astronaut would remove the feedport's cover, revealing a small hole
with a flap on the inside (visible here); this flap would ordinarily be held in
place by the suit's internal pressure. The astronaut would then be able to
drink water via a water gun
whose tip passed through the hole and eat food from containers with a similar