couple of cases of cheap Burbon in half pints.
I think there will be a market.
And tobacco.
I bought a couple of big packages of cigars. They are sealed up in humid controlled packages.
When you see Mad Max crunching on a stogie...it means I will have gas and water,. Or I will be laying by the side of the road with my head blown off.
Actually, I suspect most folks will find a way to brew (or distill) their own. Most of it will be bowl cleaner, but eventually they'll iron out the kinks. And in a post-apoc world, anything that numbs the pain will be useful.