There are 8 different corks. Each cork has a letter assocatied with it and all the corks spell B - L - A - N - T - O - N - S
You have to pay careful attention because there are two N's and they are different.
The corks also tell the story of a horse running the Kentucky Derby. The horse starts out standing still, and then begins a gallop, and then goes into full gait extension, finally slowing with the jokey pumping his fist into the air (they won).
I always keep a spare victory cork to put on any new bottle I open.
It's much more fun to collect them if you don't keep track of what you already have and just keep buying bottles randomly at the liquor store until you get them all. It's even more fun if you are really drunk in the middle of the night and kill a bottle and throw a bottle and cork right into the trash and then forget to dig it out the next morning, and then after trash day wonder "oh shit, that could have been a cork I needed"