This is my new special treat. I got one once in a gas station last winter and I LOVED it. But then I didn't see it for a while and assumed, like so many things I like, that it didn't take off and was discontinued. But not so--I got a 4 pack today from a local small grocery store--hooray!
Although this is what the official website has to say, I would describe it more as a very dark and luxurious chocolate/caramel/coffee Coke. It is decadent, like Godiva chocolates or something. It is amazing. It only comes in little glass bottles and that might make it more special. (In fact, I know that that makes it more special, because just imagining drinking it out of a plastic cup makes me feel very sad.) So yes, the little glass bottle adds to the whole thing.
If you like Guinness, espresso, or dark chocolates, give this a grown up, sultry, big sister of Coke a try. I think you might just find that its awesome.