Cauldron

A cauldron was a metal vessel using for boiling liquids in.

The Clocksmith threatened to drop Apolena in a cauldron of molten lead. (AUDIO: The Eighth Piece)

The three Carrionites (Lilith, Bloodtide and Doomfinger) which inhabited All Hallows Street in 1599 London kept a cauldron in their home for their witchcraft, including remote viewing. (TV: The Shakespeare Code)