Personal anecdote....I betcha disposable diapers will also be worth their weight in either gold or ammo.
Too bad they're so bulky.
A hundred or so years ago when my wife and I had our first child, we were oh-so poor. We rented an empty apartment on the first floor of a two floor unit. We had no furniture to put in it.
Deciding that with a newborn, one of our top priorities would be disposable diapers - we went to the local mart having a sale and bought many, many boxes of them in several sizes to allow for the kid's growth. It pretty much depleted our meager cash supply, but we congratulated ourselves on being so clever and insightful and not having to worry about having enough diapers for a long time. Food, gasoline, utilities - all of that we could now focus on because the kid was gonna have diapers.
The day after we bought them, the apartment building unit above us caught on fire in the wee hours of the morning. Everybody evacuated and we watched as the fire department poured water down through the roof from one of their ladder trucks.
Fire got put out, we went back into our unit to find about two inches of water standing on the floor.
Also on the floor (since we had no furniture), stacked neatly against wall about about four boxes high by I forget how many boxes long, was our brand new supply of diapers.
Man! Those puppies were absorbent like you can't believe! They sucked water up through all four layers of boxes from the freaking floor! Totally ruined the whole batch. Not to mention what a heavy mess they were to haul out to the dumpster.
Uhh... where was I?
Oh yeah, I remember.
Yep. Diapers are good to have in SHTF scenarios, no doubt.
Don't store them on the floor.