We're sure there have been studies showing that if you tell consumers there is only a limited quantity of something, they will want it even more. So every couple of months or so, Stone Brewing releases its Enjoy By IPA, a fresh ultra-hoppy brew that's meant to be sipped while young. So they make a small-ish amount, slap a date on it, the most recent being the 12.21.12 batch, and let people know it's now or never. These taps are from the new Pasadena store where you can get growlers filled with the stuff, buy bottles or just enjoy a pint right there. And once it's gone, it's gone. So hurry: it doesn't take much more than a cool photo of a tap handle to make the beer birds flock.