From MarthaStewardWeddings.com: Tiny roses add an elegant detail to your champagne toast. To make the garnishes, insert a toothpick into the base of each blossom at an angle of a little less than 45 degrees. Cut the stems cleanly about 1-inch shorter than the length of the toothpick; you may have to adjust length depending on the weight of the bloom. Place each toothpick just inside of a rim, letting the roses balance delicately on top.
From MarthaStewardWeddings.com: Offered as an aperitif or for a toast, this aromatic drink evokes the romance of the South of France with each sparkling sip.