I've got this vague memory of an anime movie I saw once a very long time ago (around 1990?) and I'd like to find it—but I've no idea of any names that were mentioned.
A particular unique aspect of the plot was that there was some kind of new popular soft drink that was actually made as a part of an evil plan as people died or disappeared (turned to green sludge?) after drinking it X times. The setting was near-future, and I believe that the focus of the action was on some kind of sea warships, but I don't recall much more—that's why I want to find it! :)