Grocery stores in small towns that do not sell beer or wine (looking at you De Smet and Tracy) – Prohibition was repealed in 1933; long past time to accept the fact that the wets won out (possible truthy fact: Harry Truman used to go into bars declaring his intention to “strike a blow for liberty.”)
While the local gas station will sell a frightening simulacrum of the potables in question, not having them in grocery stores tilts the playing field against the self caterer.
N-methyl-1-phenylpropan-2-amine not good enough?