Sometimes, a picture is worth more than 1,000 words (taken from inside of the new Yankee Stadium today):
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That provides some confirmation after earlier speculation. The Pabst Blue Ribbon beers for $9 are the 24 oz. variety, and they are actually being marketed as "retro beer."
I mentioned that PBR spans across generations, but I really didn't foresee the Yankees marketing it as such. The sad thing is, the hipsters will totally buy into it.