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.
The chef and menu will be disclosed beforehand, but to keep things interesting, the location is kept secret until the night before. Regulus members can enjoy a complimentary Dinner Lab select membership (normally $125-$175) to partake in this extraordinary dining experience. Each Dinner Lab event features renowned chefs at rotating locations where attendees enjoy 5+ courses with drinks included.