Hi Steve,
I haven't any pics of a 3d pint of beer. But just as an idea you can get a Jumbo brick of Oasis(same size as a box of 20) and sculpt the basic shape from that. its priced the same as a 20 brick box too. You would just need a piece of hardboard to stand it on (maybe you could spray this up to look like a beermat)
Then you'll have the design you want all made from one piece at a smaller cost as a flat one would cost.
and with you arty talents i'm sure you would enjoy the challenge

Kaz