Weigh bags made of Teflon plastic film were used during the Apollo 12 mission. Designed to hold rock and soil samples as they were collected, the bags were attached to the waist of the astronaut’s spacesuit or by tether to the lunar module. Rectangular metal frames supported the bag allowing for a large opening in the top. When filled the bags were designed to fit snugly into an Apollo Lunar Sample Return Container (rock box). This unit was used for training and transferred to the Museum in 1974.