Here is a great little idea from MarthaStewart.Com!
Enamel pails overflowing with fresh green and white hydrangeas are charming for an informal reception table. The buckets do double duty as table numbers with the addition of numeral stickers. Self-adhesive vinyl numbers are available on the Internet in many sizes, colors, and typefaces. Tiny pails that echo the shape of the centerpiece are filled with pistachios and prop up the place card at each setting. The rim of each pail has been colored with black permanent marker to match the black numeral and the text on the place cards.