Cauldrons

"Bubble, bubble, toil and trouble; Fire burn, and cauldron bubble."  

In modern witchcraft the cauldron is symbolic of the womb of the goddess and is employed in various ways during spell-work.  The vessel can be filled with water for scrying, used to burn petitions, candles, loose incense, and other materials, or as it was traditionally – a container to make potions or brews.