Nikolai Nikolayevich Rukavishnikov, who died OTD in 2002, flew into space 3 times on Soyuz 10, Soyuz 16, and Soyuz 33, in 1971, 1974, and 1979 respectively https://toilet-guru.com/blog/3.html?s=mb #spaceflight #history
Toilets of the World"It's nice to have space to defecate" — The winner of NASA's Space Poop ChallengeThe Space Poop Challenge — A blog about toilets