Floating Flower Tip - Most flowers float pretty well on their own until they start to pool with water and slowly sink. For a longer lasting centerpiece, use bubble wrap to make little skirts for your flowers.
White Roses and Baby's Breath Centerpieces in Martini Glasses ~ Your choice of color of Roses - consider gold accents. The Martini Glasses have a lovely shape. You could alternate the flower colors or glass colors Wonderfully simple idea