This site is a great resource not only for canners, but anyone storing food... which should be pretty much anyone. The tips for dry food are important if you do

This site is a great resource not only for canners, but anyone storing food... which should be pretty much anyone. The tips for dry food are important if you don't want moths. Side benefit of deposit jars for yogurt in Germany: basically free canning jars for jam, especially great for ones I'm giving away. I do a stress test before getting underway by putting washed jars in the sink, then submerging them in boiling water. I leave them like that until the water is no longer scalding. In a decade of canning, I've only had one jar that cracked after filling, and less than one per batch that fails to seal (could safely be eaten, just needed to be refrigerated and used right away)