Wooden barrels.
Problem, though -- ALL wood is treated nowadays, it has been for years -- so even wooden barrels would pose a risk, although you'd think that there'd be plastics to get plain UNTREATED lumber.
Anyway, you're reminding me, that although there were lots of metal and porcelain cannisters, I also remember several wooden food containers, which I believe would be 1930s/40s made, as well as an old wooden cannister set.
That idea of a dose of petroleum with every bottle of milk, is just disgusting.
Problem, though — ALL wood is treated nowadays, it has been for years — so even wooden barrels would pose a risk, although you’d think that there’d be plastics to get plain UNTREATED lumber.<<<
Could one go to the sawmill and get green lumber, as sawn, then allow to age and make it into boxes, along the line of the old style cedar chests?
Making your own chests would be better than barrels, as they will stack on each other.
Sealing will take some research, but maybe wood ashes mixed with water will work, to make a putty to seal the cracks in them, for insects do not like hardwood ashes.
I find that I use more mustard now, as I do not like the mayo in plastic jars.