Hello,
I found this out in the wild and it is a Chrometoberfest 2011 Beer Stein that was given to only Google employees at an event. The link here is an article from an employee that talked about the event.
https://plus.google.com/+PeterKasting/posts/V45KMmMB3Rn
I guess this could be a highly collectible Google product since it was never released to the public.