A total of 12 astronauts have landed on the lunar surface and have left a total of ~96 bags containing urine, feces, vomit and other waste. Minimizing weight on board the spacecraft was essential in order to bring back samples of the moon. – WTF Fun Facts
Source: Why Nasa wants to bring back 96 bags of poop from Moon – Times of India (indiatimes.com)
This pic is, in fact from the movie set of “A Space Odyssey”