Let's not get too sidetracked in this thread by my mention of Pepsi Perfect. Point is well-taken though. We're already discussing Crystal Pepsi in greater detail here, and Pepsi Perfect here and here.
I brought up Pepsi Perfect because it's the pure cane sugar formulation of Pepsi, comparable to Double-Cola and classic formula Coca-Cola.
The past few years have seen a resurgence in regional colas and specialty soft drinks! Pepsi Perfect, Crystal Pepsi and Surge certainly garnered the most media attention. Big soft drink companies like Coke and Pepsi have also given us other cool colas, like Pepsi Throwback.
There are many other "little guys" that have flown under the radar though! Many of these are classic regional colas that we grew up with, that are now making a resurgence as local flavors and premium soft drinks. Many of these inherently have a retro theme. This is what I'd like to delve into in this topic.
What I really LOVE about the story of Double-Cola is that it's the underdog that made it! It's one of those "what ifs" that actually came true! For all the discussions we have on "what if Atari did this one thing differently", "what if Atari had gotten the rights to the NES", "what if E.T. had been a successful game", this is one of those rare stories where a beloved brand fought to survive and came out even better than before. It's not often that we get a nice story like this. I love it!
There are many specialty soft drinks that come to mind. Jones Soda, Stewart's, Nehi, and others. There are also regional colas that have never really gone away, like Vernors, Schweppes, Faygo, and Cheerwine.