Luckily, "blue raspberry" is a made-up flavor — meaning that you won't actually find blue raspberries out in the wild. So, we can't say if the flavor of this beverage is or isn't reflective of a "natural" flavor. But, we can say that its flavor is not as overpowering and artificial-tasting as the Arctic Vibe Celsius that we sampled — which is a good thing. Moreover, energy drinks aren't something that we would classify as being "easy to drink," as a whole, but this one gets pretty darn close to it. We found ourselves taking sip after sip of it without a second thought. While may not be as refreshing as the top-ranked brands on this list, it earned a respectable spot in this ranking of the best Celsius flavors because of its mild, non-saccharine flavor and high drinkability. , With a unique blend of key vitamins, Celsius energy drink is your partner to an active lifestyle. These energy drinks are clinically proven to function and also contain no sugar, aspartame, artificial flavors, colors or preservatives!, What is in Celsius energy drink? Celsius is a popular energy drink with a stacked ingredient list and lots of claims of positive health benefits (1). Among the ingredients are green tea extract, guarana seed extract, caffeine, taurine, glucuronolactone, ginger extract, and green tea leaf extract. One drink has 10 calories and 0g of carbohydrates..