I vote pee. I make that stuff every day and it's proof of work.
Discussion
It used to be more valuable, too.
Urine can be utilized for a lot of things you'll be surprised.
It can be used to make gunpowder, and fertilizer π!
https://www.todayifoundout.com/index.php/2013/04/urine-facts/
Well, if that's your thing π .
We're not kinkshaming but personally we like bottlecaps π!
