FREEZE DRIED FOOD Freeze dried food is food that has had all of its water taken out. The reason that freeze dried food is good for space is: Bacteria can't grow on it because it has no water. Freeze dried food is a really good thing to have if you are trying to pack light. Although NASA did not invent freeze dried food, they use it a lot and they perfected the system. They even made things like freeze dried ice cream. Freeze dried food is pretty common in grocery stores and freeze dried coffee is a very common in places like hotels. Before astronauts had freeze dried food they had to eat stuff that they squeezed from a tube. Before astronauts get on the spaceship they get to choose their own menu for what they are going to eat while in space. They choose their menu for seven days then after those seven days are up the menu repeats. The food goes in little bags which are marked by colored dots to show who's food it is.