This can be done between two friends who like to dare each other and see each other humiliated... between a master and pet, master and slave, dom and sub, workout partners...
Basically any two people who hang out together in some capacity, and know and accept one another's kinks.
It could be done simply as a challenge, as a punishment, as a funishment, as the wager of a bet, or as motivation to help a friend achieve a goal. It could even be modified to be randomized to motivate two people!
So here's the setup. I'll write it for Dom and sub, but by all means, adapt it to your situation!
- Sub is to buy three single-serving sized bottles of apple juice. They are not to be marked in any way.
- Sub will then empty or drink one bottle completely, and then refill it with their own pee.
- Sub will then give all three bottles, one opened and full of urine, two sealed and full of apple juice, to the Dom.
- Dom opens one of the two sealed bottles and drains/drinks as much of the apple juice as they see fit.
- Dom replaces the missing apple juice with any combination of their own pee, and the sub's pee from the other bottle, in any concentration or ratio desired, but with the idea being to closely match the appearance of the actual juice.
- Dom then places the two full bottles in their fridge.
- The next time Dom and sub meet up to work out, play games, go to lunch, or any other activity, public or private, they may bring both bottles along. These will be the beverages the pair share today!
Obviously the intent is that the Dom drinks the apple juice, while the sub has to cope with the mixture of juice and two people's pee, but it could just as easily be randomized (just pop the seal on the juice so they look identical!) to work between friends or competitors.
If you're in public, you must act as though it's perfectly ordinary, delicious apple juice, no matter how much is actually salty, acrid piss! If you're in the role of the sub in this dare, and you know it, I suggest being very kind to your dare partner. Maybe given them a gift, or flowers, or eager sexual favors so they'll be generous in the ratio they use to fill your future refreshing beverage!