[Aquifer]

I remember these, too, and a really fun story about them was part of Marvin Miller's Book "A Whole Different Ballgame." As he told it, the owners were doing all they could to block the formation of the MLB players union and Miller, in his first year, had almost zero money to fund operations. But they were able to run this tiny promotion with Coke, airbrushing out the cap logos because the owner's wouldn't allow it, and it was just enough sponsorship money to keep the fledgling union alive that first year. We know what happened after that. I have a couple that I keep just for that connection.