TV Toy Memories serves up this long missing ad for Welch's Grapeade. Fred Flintstone (Alan Reed) & Barney Rubble (Mel Blanc) are finishing a round of golf, when Fred decides to get some refreshment. Not sure if it's Blanc or Don Messick as the salesman. The video begins with a clip from Space Ghost, from what I can tell.
Unfortunately, Welch's doesn't make this anymore.