Coca-Cola has been hiding cash rewards under their caps in one form or another since at least the 50’s. There were baseball promotions in the 60’s, and a Star Wars promotion in the 70’s.
I find a ton of bottlecaps, the majority rusted beyond recognition of any beverage brand, but the aluminum pull tabs are often legible. And I find those. Not everyone played, and most folks didn’t bother with the pull tab version, so I retrieved tons of these in the 80’s. Most said “PLAY AGAIN,” but I found plenty worth .25, .50, and even a $1.00. Odds were 1/1000 for the $`1.00 prize. 1/100,000 for $100.
Here are several varieties I’ve found recently (none winners). TRY AGAIN, PLAY AGAIN!, and a letter with three dollar signs – E $$$.
And if you look closely, this curled up bit is a ten-cent winner!