Coors. It's a once a year thing they do with Winterfest, but I've never tried it, yet.
I just hope it's half as good as their Blue Moon!

(from Coors)
Winterfest...
Brewed only once a year for the holidays, Winterfest is a handcrafted brew that has earned Coors much recognition and has become the nation's longest-running seasonal brew, celebrating its 20th anniversary in 2005.
Coors offers Winterfest nationwide in limited quantities and packages during the holiday season.