You will need a cup, bowl, or chalice of silver. Glass is the best substitute. On the night of a full moon, set the chalice outside or in a window to absorb the moon's lunar rays and energy. Leave it there for a few hours before the ritual.
Place the chalice with water in it, in your non-dominant hand and place your other hand over the top of it. To empower the water, say:
"By the silver light of Lady Moon,