If we're dreaming of drinks gone by, I recall something called "Iso Green" from a college cafeteria's soda fountain in the mid-90s. It seemed like a budget beverage; the logo was just a clip art surfer dude with a thought bubble reading "Iso Green." Or maybe it was a golfer. I don't think it was carbonated. It was pretty damn green. It didn't taste anything in particular; it was a post-representational flavor. I don't even necessarily want to drink it again; just getting closure would be nice.