Slovenian (then Yugoslav) response to the coca type drinks, just done right. It's got no secret ingredients, still uses real sugar (after 50+ years) and doesn't really get you thirsty again in 20 minutes. The "drink of your youth", as the revival ad said, is the only brown zuckerwasser that I indulge in.
Actually spelled cockta, an early example of engrbian, and despite the name I never heard of a cocktail where it was an ingredient.