I used to save all the glass mayonnaise and mustard jars before everything went to plastic, because they were really canning jars, just had to but the lids and rings. Before Katrina and Rita, I had hundreds, if not thousands and a WI pantry, my sister said was like a small grocery store! LOL It stayed packed and I could have lived on it for a year, before having to go shopping! I guess when you go hungry as a kid, you become a food hoarder, so your kids never have to go hungry. LOL
The blue ones with glass tops and locking snaps, were used as canisters for flower, sugar, rice in the pantry, so they would not get broken accidentally in the canner, but K * R, took almost everything from me except my kids and 2 cats, so I am grateful for that. My large, close family and siblings moved away, as most in St. Bernard did, and it became like Little Mexico! I don't know if Aunts, Uncles and Cousins are still alive! It was small town life , where everyone knew everyone, now it is like a foreign country.
HA, as soon as the civic center, where all the government offices were rewired and got phones and electric wiring in, a gang of Mexicans gutted out all the wiring , overnight to sell the copper for scrap. A few were caught, I think, but not much was done as most were illegal working for Texas construction companies and stealing everything that wasn't nailed down! People's houses were being robes as fast as they were being renovated, until most gave up and moved away. My home has over $330, 000 in damage but was still only half undamaged, but with all that was going on( they cut hoses up for the brass connectors), I would rather live in the US rather than Little Mexico. It the time it took to go 3 miles to the only store and back, about 1/2 hour, they stole the large Propane tank from our travel trailer and my clothes hanging on a makeshift clothes line, plus the close line and plywood covering the windows, smashed my 6 and 8 foot vanity mirrors and a case of assorted liquor I didn't want broken glass from, but had rusted caps. I hope they poisoned themselves on it!

Sorry about the rant, but I did love those jars, too!
I