Starbucks Refreshers - $24.1m
50mg of caffeine per 12oz can from a green coffee extract with a dose of ginseng and B vitamins. Essentially that makes Starbucks' carbonated offering an energy drink, although the use of stevia and 25% fruit juice (at least in the Orange Mango Refresher flavour) really boosts the proposition.
(Photo: Mike Mozart/Flickr)