Just a short annotation:
I once drunk that Cab-Drink in Germany. (You know: Cab - Cola and Beer, flavored with Dragonfruit) and was asking myself why it tastes only like Cola and Beer. Since I'm here in Singapore, I know it. Dragonfruit has no taste at all. I'd say even less than tofu, and that's really hard to achieve! So just a nice little marketing strategy from the producers...