Most of the piss wh*re training vids, there are about 30 of them on xvideos.com
A few from Eroprofile:
http://www.eroprofile.com/m/videos/v...iter-Quick-Pee
http://www.eroprofile.com/m/videos/v...-Pisse-trinken
Above link, looks like less than a litre as not to the top, maybe 900ml? Also beware she drinks it
http://www.eroprofile.com/m/videos/v...-than-2-liters
Above, very famous Sister24 clip
I have more just don't want to put them all in the same post.