Duracell has been powering the world with batteries for a very long time. And now they have their own energy drink. At first glance it doesn't seem safe to drink but I suppose it is. Its actually been out in the Czech market since 2008. What's in the drink? Not electricity definitely but things like caffeine, taurine, B vitamins and sugar.

[Duracell and Master in Imagineering via Le Journal du Geek]