...made by Scottish waterfowl: Tactical Nuclear Penguin.
Ridiculous costumes (and Shallow Grave accents) aside, it's a pretty fascinating process: a stout, aged 18 months in scotch casks, then frozen (like an Eisbock), the unfrozen part carried over for further freezing (like a chilly Sherry solera.)
Enough talk; I want to try a pint...
"You know what's right with this world? Nothin'!"
-Oscar, "Grouch Anthem"