The capacity/chyen indicators that already exist (that I can think of off-hand) are:
Drinks/barrels/cans: Nearly empty, quarter full of chyen, etc.
Containers: A pile of chyen.
Pay: Some chyen, a shitload of chyen, etc.
Count/Wallets: XX,XXXc.
Batteries: [##########...]
The ones that seem to make the most sense to me are wallet or pay values, only because the drink code on high capacity containers tends to always show nearly empty, but really any of them would be awesome and I think this idea in general is super cool.