The listing, Twenty-Six (26) Facebook Flavor Codes has ended.
This auction is for twenty-six (26) unused Flavor Codes for use on Facebook at: apps.facebook.com/FlavorCodes
According to the FlavorCodes Facebook page, every code wins you some (random) amount of Facebook credit that can be used for games on Facebook.
See the link above for more information.
PLEASE NOTE:
11/30/13 is the end date of the Flavor Codes Program, and you can only enter 3 codes per day. In order to use them all, you'd have to enter three every day, starting today (11/22). If you will be unable to use them all in time, you can always put some of them back up for auction!
If you have any questions, please post them in the comments and I'll be happy to answer them as soon as possible!
Note: I don't know what kind of soda the caps are from, but apparently it works to pick any kind when entering the codes.