Oh. My. God. Talk about your elixer of the gods, this is it. I'm a bit of a nut for elderflower anything. When I can find it there's usually a bottle of elderflower syrup in the frig, ready to mix with sparkling water, on those rare hot summer days and on those dark drizzly days when you think summer, hot or otherwise, will never come again.
When I googled for an image of the bottle, itself a cool object, I discovered that one of the Garden Ranters had discovered St. Germain. I'm tempted to start a garden club just so I can serve elderflower cocktails at the first meeting.