It is on page 279 of the Color Companion Unofficial Guide to DS 2010. I bought it for my kids and was flipping through and saw a picture. The beer it looks like any other light beer, but the mug looks awesome!
I've also never seen nor heard of this, and I normally check for any out of the ordinary beers. Certainly wouldn't expect this @ DAKL, more likely DHS. Woody did call Buzz "Buzz Light Beer" in Toy Story, but I think that's the extent of it.
I listen to a podcast that includes a member of the Unofficial Guide "writers" (?)... not sure what to call him. He made the comment recently that there were some "jokes" in this book. Not an expert, but, I think you may have found one!
I wouldn't expect Disney to use any of their characters to market beer. Look what happened when they tried to put Remy on a wine label. Would guess this is one of those Unofficial Guide jokes.