I would suggest sticking it in the freezer (mild chill so it won't freeze to ice), or in the fridge. Keep it in a sealed, tight container like a tupperware and then wrap it in more plastic. The sooner you use that urine, the better the results of your urine or the other person's urine. Source(s):
Regulus (also known as Alpha Leonis) is a trinary star system at coordinates 3.99S 2.81E in Federation space, known as the Regulan system. Regulus is visible from Earth in the constellation of Leo. The system's three stars include Ra and UFC-113, and are the location of at least thirteen planets.
Marcus Atilius Regulus. flourished. Marcus Atilius Regulus, (flourished 3rd century bc), Roman general and statesman whose career, greatly embellished by legend, was seen by the Romans as a model of heroic endurance. Regulus served as consul in 267 and 256.