Canisters are commonly filled with silica gel and other molecular sieves used as desiccant in drug containers to keep contents dry. Silica gel in a sachet or porous packet. A desiccant is a hygroscopic substance that induces or sustains a state of dryness (desiccation) in its vicinity; It is the opposite of a humectant. Commonly encountered pre-packaged desiccants are solids that absorb water.
Armstrong in November 2011 at the U.S. Capitol, when he and the other astronauts from the Apollo 11 mission were awarded Congressional Gold Medals. Former astronaut Neil Armstrong, known for his words, That's one small step for man, one giant leap for mankind, has died. The first man ever to walk on the moon was 82.
He became the 10th person to walk on the moon during the 1972 Apollo 16 mission. He was accompanied on the mission by John W. Young and Thomas K. Mattingly II. He was one of the first astronauts to inspect, survey, and sample materials and surface features of the rugged lunar highlands.