You can find Earth, Water, Air, and Fire as well. The tool meditations: Wand, Pentacle, and Athame/Sword.
Ground and center. Hold your cup cradled in both hands. Breathe deep, and feel the power of Water, of feeling and emotion. Be in touch with the flow of your own emotions: love, anger, sorrow, joy. The cup is the symbol of nurturing, the overflowing breast of the Goddess that nourishes all life. Be aware of how you are nurtured, of how you nurture others. The power to feel is the power to be human, to be real, to be whole. Let the strength of your emotions flood the cup.
Exercise courtesy of The Spiral Dance by Starhawk