Or one filled with different bath items. Or one filled with all kinds of bulbs, seed packets, and gardening tools. You may want to contact the nearest one in the area, it is a good win win situation for them. They get exposure to their products which everyone loves and in turn we get wonderful centerpieces to use as door prizes, etc. There are several themes that can be used.
Plates can be metal, ceramic, glass.
Also, we made up little lamps for one of our showers. My daughter has the template for the shade. They are made with wine glasses which have a colored stem. We decorated the shade using ribbon or stenciling to match the color of the stem. They're very cute but the shades are very time consuming because they not only have to be cut, but then you have to size each one of the shades to the individual glass.