Since there are four codes, am I being too hopeful to assume that each type of cup has a different code?
One for the making-of videos,
One for the Kratos premium theme,
One for the PC wallpaper image (lame),
and one for the in-game armor (awesome).
The original article also states that there will be "Hanging neck tags on all Mountain Dew two-liter and 20-ounce bottles will also include codes that can be redeemed at slurpee.com." So you can just gather points, and redeem what you want? I need more details!