Food on Apollo 11

Requirements
These meals had to be lightweight, compact, and edible in zero gravity. Until very recently, all drinks had to be sucked out of straws. Even the smallest drop of tomato juice had to be caught, in case it interfered with the craft in some way.

Another less obvious problem with space food was what to do with it once served its purpose and left the astronauts' bodies. The pleasant euphemism NASA created for this is "low residue." The other unpleasant fact is that in-flight nausea and other "undesirable physiological responses" during earlier Apollo missions had been attributed to food. There's nothing worse in a cramped, stuffy space cabin than a fellow astronaut with "enhanced gastric awareness."

 NASA scientists employed the "wet pack" food technology developed on Apollo 8. A wet pack allowed thermo-stabilized food to retain its moisture content, thereby saving astronauts valuable food prep time. It also allowed them to see and smell what they were eating, rendering Beef and Potatoes a bit more appetizing.

The spoon-bowl packet

Apollo 11 Beef with vegetables in the spoon-bowl package, before and after rehyrdration. View larger. Photo vianasm.si.edu

A major improvement in food technology from the Apollo 11 mission was the spoon-bowl packet, allowing for food to be rehydrated and warmed in a pouch, which was then opened with a plastic zipper and eaten with a spoon. The moisture in the food made it cling to the spoon, even in a reduced-gravity environment. Sausage Patties, Pork With Scalloped Potatoes, and Chicken Stew were some of the delicacies packed in spoon-bowls and enjoyed by our guys in space during the Apollo 11 mission.

Information received from:

http://www.eatmedaily.com/2009/07/food-of-the-apollo-11-lunar-landing/