Fresh urine is a fleeting thing. Like a good joke or a parking spot. You’ve got about 30 minutes to an hour at room temp before it goes south. Refrigeration gives you a day. Freezing gives you months—but with side effects.
So, how long does urine stay fresh? Not long enough to mail it to your grandma.
Now, go drink some water. And whatever you do, don’t start a collection. Your bathroom doesn’t need a museum.
