The first can I want to post about is a Red Creme Barq's can that had a black cap on it resembling a hollowed out hockey puck. I took the cap off and the can had no lid on top of it. And then I read the cap. Apparently at one point they had a contest where you could instantly win a digital watch.
Inside the can was a thick cardboard roll that made the can feel about the weight of a full soda can. I don't know if the cans were hidden inside 12-packs or in vending machines (probably the former).
The only thing that would have made this can better is if the watch had still been with it. I have searched all over the internet and can't find anything about the contest. And so far I've been unable to date the can.
They also had a regular Barq's can that was a winner, but since I had that design already I just bought this Red Creme can. Now I wish I had picked up both of them.
If you have any info about this can/contest, please post a comment. Thanks!!!
10/24/12 update - BeerCanRich99, someone I've traded cans with in the past, found a picture of the Barq's watch. Thanks BCR99!