Okay, so, as I understand it (which may not be right), the market for food is inelastic, because people can't live without food. The market for cheese-flavored food would be elastic because you don't need cheese-flavored food, you can substitute other food for it. And the market for cheezits in particular would be very elastic because there are many possible substitutes for cheezits.

Likewise, the market for alcohol would be relatively inelastic, the market for wine more elastic, the market for box wine more elastic (because you can substitute non-box wine), and the market for Chateau Lafite really elastic, because if you've got to drink wine, it doesn't have to be Chateau Lafite, it can be a cheap Merlot or Zinfandel just as well.

ETA: I just called cheezits "food."

ETAA: and of course the more cheezits you eat the more elastic your waistband needs to be.