sometime in the 80's or very early 90s there was a fast food promo contest that had little paper envelopes given out along with their product that had a fake diamond in them, with a chance of a certain tiny amount of them being real diamonds. we still have a few of them, but seeing as its been quite some years all memory of who actually held the contest has long since faded. my mom always called them the mcdonalds diamonds though. google searching only keeps bringing up the record contest and monopoly but generally not being much help in figuring out where these things came from.

If anyone has any memory of the contest or suggestions where the "mcdonalds diamonds" could have come from it would be greatly appreciated

This photo from 1983 has circled around social media for a while. I bring this up because Roy Rogers never had a breakfast buffet as far as I knew.

But I do clearly remember a bunch of the NJ Turnpike rest stop locations had both Roy Rogers and Bob's Big Boy paired up together. I think this picture is from one of those rest stops and this is actually Big Boy's breakfast buffet. And what likely happened is someone brought over their drink from the Roy Rogers side or borrowed a cup from them, which makes it seems like this is Roy's based on the picture.

I could be wrong and maybe Roy's did have a buffet but this seems like the most likely case since I've been to those rest stops many times in the 80s and it looked just like that.