The Cauldron reference article from the English Wikipedia on 24-Jul-2004
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Cauldron

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A cauldron (from Latin 'caldarium,' hot bath) is a large metal-made pot for cooking and/or boiling over an open fire, usually attached to a hanger with the shape of an arc. In legend, a cauldron is usually where leprechauns keep their treasure, and also where witches prepare their potions, most notably the weird sisters in the play Macbeth. As a cooking vessel it is mostly obsolete. It is believed that a predecessor of the Holy Grail myth was a cauldron. [1]