The Cauldron is a large black boiling pot that is used for cooking things, in this case, two wet bears. The pot rests on a bed of wood, the source of its heat. It is also very very very shiny.
The cauldron is never actually used and is merely pointed out by Amos Bear as he claims being cooked to be the "worst idea he's ever hears." That's really all there is to say about the cauldron really, and I'm just typing filler at this point to make this look more "professional." I sometimes wonder if people will actually ever find this wiki...
"A cauldron? Is Beachcomber Bill a witch?!"