Pretty cool!
This would force us all to filter our beer

....looks excellent for taking pics of a particular beer, etc. though.
I wonder....if you could create a 1/2" thick coaster with a single LED in it, it might be pretty cool.....or maybe make a "bank" of these on a coffee table with a central power source. LED's would keep the beer from heating up.....different colors would be for different people.
Great idea!