My dad and my mom worked hand in hand at canning. It was more my dad's thing than my mom's. When he was a child, he was so poor that he often went hungry, and all his life he never wanted to be hungry again. He was always locating produce that he and Mama would put into jars. They were always preparing for the end-times.
First of all, the jar looks like this. This is a jar of tomatoes wrapped in a pharmacy bag, the small flat kind the pharmacist puts your medicine in. My parents reused and recycled everything. They were not necessarily health-conscious, but organic agriculture always made sense to them. Out of all the alternative ideas I brought home to them, this one stuck. They would can whatever produce they had, but you can see that being organic was important to them, because they noted it.
These particular tomatoes were grown by Freddie White, who was a chemical farmer in Appling County who saw a way to make more money with organics. He grew organically for Whole Foods and other retailers until he passed away a few years ago. He was a close friend of my dad, and a good friend of mine. Eating tomatoes he grew feels really good -- Freddie continues to nourish my family.
On the paper bag, as well, is written "Canning Jar." You'd probably never guess why this is written there. Here's the reason: some jars are real canning jars, produced by companies like Mason & Ball, and some are post-commercial jars that products like mayonnaise and salsa came in. If the rings and lids fit the recycled jars, my parents used them, although as you can see, real canning jars were always superior (and, indeed, less apt to burst in pressure canners & boiling-water baths.)