Has anyone heard of something called and "Amazon Bitter"?
There is a local ice-cream and soda shop that has a notably anacronistic angle to it, and the owner asked me if I could help him find some information on them. And where one might find them.
https://en.wikipedia.org/wiki/Bitters That's the most immediate answer I can find.
https://en.wikipedia.org/wiki/Angostura_bitters ; I point this out because its from South America (Which might be the source of confusion with "amazon" and the fact that Angostura sounds like it might be something confused with Amazon when you're trying to recollect something.