It’s sugar free! That’s the best bit to start with. It’s flavoured with Acai Berry, and that’s a difficult flavour to pin down in terms of a description but I’ll try. To me it tasted like mixed berries (raspberries, blackcurrants) with a slight bitterness and tang added in similar to what you’d get from a tropical drink. Because this was an American drink, it was in a larger can than we’d expect in the UK, but I liked this drink overall and I hope that Red Bull start bringing their new editions over here.