Which jars can you use for canning? Are recycled jars ok?

Canning is becoming popular so the gist of jars and related accessories is increasing.
So do you need to buy mason jars for preserving / canning or can you use recycled jars? And which ones are best?
Here is some real world experience to remove the mystery

[@floydaustin49]

Thanks! Just the Thing!

[@randomreviews1461]

Exactly what I was looking. Going to be jarring this summer and though of this idea of reusing jars BC why not?! Also trying to get into the habit of cleaning and reusing plastic containers for storage. Seems like we waste such good reusable items without even thinking about it. Thanks again.

[@j7ndominica051]

It's a no brainer to use these jars. Our stores offer them empty in fall, and they cost 1 euro empty. The button is only an indicator. The air pressure will push down even flat lids. You cans see an indentation if you look carefully with a flat ruler. They take an effort to open and may pop. Only some mass produced goods come with a button in our stores.

[@angelmesih]

Thanks for your video. How would you calculate processing times for the various sizes?

[@AlecL]

Would you use those jars for pressure canning?

[@becksbasics1]

Many people use recycled jars for pressure canning. If you’re concerned whether your particular jars are suitable (and most with the pop top safety button are), just run a trial with a couple filled with water in your pressure canner.