Jack Daniels.
Pshaw. No disrespect to Mr. Jack, or Lem Motlow, or any of the boys in Lynchburg... but if it's TEOTWAWKI, I'm reaching for the stuff on a higher shelf:
Note the proof rating... a bottle of this stuff will put you away as effectively as those little pills in On The Beach, and taste a lot better too (at least until your tongue goes numb).