It's sugary and has caffeine, but if you are otherwise healthy and not avoiding sugar for health reasons (personally, I don't eat much of it because it makes me feel ill, pregnant or not), then it should be fine as long as you keep an eye on your caffeine consumption. It looks like there is about 46 mg of caffeine per 380 ml bottle, which is about the caffeine roughly in a cup of tea (in comparison, espresso has about 60-80 ml per shot). If you are drinking more than 4 bottles a day, yes, I'd try to limit it. Otherwise, it's probably fine in moderation if it doesn't make you feel ill.