Apparently, NASA sent a memo to its employees at the Johnson Space Center asking for their urine so they, NASA, could use it to test the Orion space capsule. How much urine? 30 liters per day, including weekends. Disposal of urine for up to six months would be required if Orion is to work as planned.
Alert reader nettamere adds a link to story at Discovery.com, excerpting: "Donations will be treated with a chemical that can hold solid particulates in the liquid so they don't clog up the tubing in microgravity, said Leo Makowski, company spokesman for Hamilton Sundstrand, a contractor designing the new spaceship's toilet. ... "It's difficult to come up with a faux urine, explained NASA's Jim Lewis, the systems manager overseeing development of Orion's potty. 'That's why we depend on collections.'"
The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found it!) but "That's funny ..." -- Isaac Asimov