I’m trying to figure out what makes First Start different to other Rock Star energy drinks. It says that it derives its caffeine from natural sources (so that’ll be the guarana then, not so unusual), and that it contains 5% fruit juice. I guess it’s that last point that makes it ‘first start’, like it’s supposed to be your morning fruit juice drink possibly? Bad idea if you’re doing that in any case! Anyway, the drink has a nice sweet orange flavour to it, quite sugary tasting yet low in calories. If we ignore the odd/confusing branding choices, it’s a good old stonking sized can of energy drink.