gall bladder / courage / guts / gall / inner container (e.g. bladder of a football, inner container of a thermos)
胆
=
旦
+
月
:
Don Quixote (d) suffers from a huge moon-shaped (月) gall stone (胆), so inside of the anthill (an3) he drinks medicine from a big mug (旦). His moon gall stone is so big, it has gall stones on its own and it is drinking medicine from a mug as well.