It's symbolism and uses are the same as for the sword and athame. Sometimes a ritual will call for you to rap the cauldron three times with the wand. Chalice - A cup, usually placed on the altar, which symbolizes the Goddess. The round fullness of the cup is a reminder of fertility and birth. The chalice is often filled with juice or wine.
Some worshippers drink from the chalice, in tribute.
Others prefer to pour the drink on the ground, as an offering. Some prefer to do a combination of the two practices, sharing what they have with the Goddess. Cauldron - The cauldron is another symbol of the Goddess. Fires are sometimes lit within the cauldron or incense. Flowers are sometimes placed around the cauldron, to further symbolize the fertility of the Goddess, or as tribute to her.