Instructions:
Substitute club soda or sparkling water for seltzer water if desired.
One note for serving: You should NEVER get passionflowers that have been grown non-organically, because they will almost definitely have chemicals on them that you do NOT want near your food! If you have no way to acquire passionflowers (or even if you do and you just like this idea), I might suggest investing in some rose-shaped cake pans--they're usually in a set of four or six and make cupcake-size cakes--and filling them with water and freezing to make big pretty flowery ice cubes. You can even sprinkle some mint leaves in there to freeze into the cubes. It looks beautiful, but believe me, it won't last long under the hot sun!