Thums Up from India
I heard a lot about Thums Up from my Indian friends all throughout college, but never got a chance to try it until I recently found it in an Indian food specialty shop. After hearing so much praise, I had very high expectations. It looks and tastes like a cola, but it does have a distinct taste from the likes of Coke or Pepsi. It's flavors are more like China Cola, herbal and aromatic, though sweeter and more carbonated.
It may just be my bias knowing it comes from India, but the spices and flavors in it do seem to match the profile of Indian food. According to Wikipedia, it has a taste "reminiscent of betel nut." I don't know what betel nut tastes like but for anyone who does, maybe it gives you a better idea of what I'm talking about. That being said, it is still a cola, and may just be an interesting drink as an alternative to Coke. Its interesting flavors would also make a good mix with rum for a rum and thums up.
Thums Up still comes in a glass bottle with an actual, real bottle cap that you have to use a bottle opener for. What it might lack in convenience, it makes up for in authenticity. Despite the fact that it's made by Coca-Cola, I still give this drink a thumbs up.