Afri cola.. Had it once on a trip to Berlin. Me and my friends had a hard time trying to explain (in German) to the waitress that we wanted the empty bottle with us (looked funny compared to the usual). It might just be nostalgia, but as I remember it, it tasted hella good

Haven't had it since, as its only sold in Germany and some parts of the US. Still have the bottle as memorabilia.
http://en.wikipedia.org/wiki/Afri-Cola
Edit: spelling