Found this great old Mountain Dew can a few weeks ago. It contains the groovy lettering style I love and remember so well as a kid, but also contains the "ya-hooo!" catch phrase hold-over from the earlier product and advertising designs that incorporated the cartoon hillbilly. Not 100% certain on the date, but judging from the pull top, I'd say 70's. Has some rust and scratches, but I think it gives the 'ol can some character, don't you?