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.
Vastus medialis. The vastus medialis muscle is a part of the quadriceps muscle group, located on the front of the thigh. It is the most medial, or inner, of the quadriceps muscles. It extends the entire length of the thigh. The portion of the muscle that is just above the knee is sometimes referred to as the vastus medialis obliquus, or VMO. This muscle is used to extend the leg at the knee and to stabilize the patella, which is also known as the kneecap.