I swung by Hopworks today for lunch and grabbed a couple of bottles of Ace of Spades while I was there. It's a great beer, but what really stood out for me when I got the bottles was the great packaging. Hopworks always has great looking products, but this bottle is special. Mainly, when you look inside the bottle at the right angle, while holding it up to the light, there's a skull with an ace on it's forehead that's only visible on the inside... an "easter egg" if you will.
I tried to take some pictures of it, but my bottles are full right now. It's easier to see in an empty.