Soup Kettle
A large iron kettle used by Scoodlers for cooking their captives
First named in The Road to Oz, ch. 10
It made Dorothy shudder to see a huge iron kettle suspended by a stout chain in the middle of the place, and underneath the kettle a great heap of kindling wood and shavings, ready to light.
As the books describe them
a huge iron kettle suspended by a stout chain in the middle of the place, and underneath the kettle a great heap of kindling wood and shavings, ready to light. The Road to Oz, ch. 10