Photo courtesy of Amore Event Design
Anchor silk flowers using clear floral marbles is a glass or vase of water, add a floating candle and voila! an easy economical centerpiece. Add some votive candles is a coordinating color or the same color as the flowers and you have a great centerpiece.
Be sure to test the glasses out to be sure they are able to withstand the heat of the floating candles, I've seen centerpieces shatter when the glass was not meant to withstand the heat of candles burning.