I don't think they make it anymore, at least it's not available where I live
Kiss

A close match is [/U]sour[/U], but they don't have that down here in the south either

There is a generic brand that's kind of close, grapefruit soda.

Sometimes I'm in the mood for sweet, then it's rootbeer.

So
1 kiss
2 grapefruit
3 rootbeer