The Wiccan chalice serves as a representation of the feminine energies, and holds the Element of Water. The chalice serves to remind us of the Goddess during the Great Rite, as the athame represents the God. In rituals that do not involve a Great Rite, the chalice is often passed around the circle, containing wine, water, or some other liquid to be ritualistically sipped, the remainder generally being spilled onto the ground as an offering to the Gods.
As the Wiccan Chalice is a pure representation of the Divine Feminine, the type of chalice that you choose for your rituals should be in accordance with your perception of what would most suit the Goddess as you know Her. For example, if you feel that your Chalice must be made of silver because, to you, the Goddess is best attuned to silver, then by all means, purchase a silver chalice.
Wiccan Chalices come in may variations, are made of many materials, and are embossed or engraved with many different symbols. One who follows an Earth Goddess as one's Matron Deity, you might choose a green or a smoky agate chalice, or even a wooden chalice One who is better attuned to Water, might choose a blue pottery or stoneware chalice. Or, you might choose a chalice based solely on your own favorite color, or what color you are best attuned to.
Kestra uses different chalices for different workings. For example, for a Dark Moon working, she uses a black chalice. For waxing or full moon, she uses a Triple Moon chalice. For weddings, she uses a white Triquetra chalice.
You can even get plain chalices. For example, an inexpensive plain brass chalice is versatile and useful for many different rituals and events.
The gamut of Wiccan Chalices goes from a paper cup, if it's meaningful for you, to solid gold jewel encrusted ones. Enchanted Works doesn't carry either of those two extremes, but we have many other beautiful Wiccan Chalices for you to choose from. Whichever one appeals to your sense of aesthetics, or what you feel is appropriate for your workings, is the chalice that is right for you.