Thanks, Mike. This raises an issue that I had never considered, "snippets of DNA." Because we now know that it is possible to make even the nastiest water potable by putting it in a clear bottle and setting it in the sun for a few hours, I assumed that a less lengthy process than storing the stuff for 12 to 18 months would be to treat it like water. Assuming that the urinary bacteria are no tougher than the stuff floating around in puddles and the like, I figured they, too, would "pass on." Now these pesky snippents.