Cauldrons have been an important tool for the Craft throughout history, traditionally used for cooking and brewing.  It represents the Water element, the direction of West and also the Fire element.  Use for scrying, incense burning, mixing herbs, oils and brews. In some forms of Wicca, incorporating aspects of Celtic Mythology, the cauldron is associated with the goddess Cerridwen.  Cauldrons symbolize not only the Goddess but also represent the womb (because it holds something) and on an altar it represents earth because it is a working tool.