Many of the modern jars are the equivalent of vacuum seal canning jars.
Stuff like Salsa, Olives, etc, are made and cooked at the factory, and vacuum sealed.
A good washing and they are easily re-usable.
I have bunches of them filled with peppers and mushrooms I ran through my food dehydrator.
For what it’s worth, I cook hotdogs in a reuseable salsa glass jar. Put a pack of dogs in the jar, lay it on its side in the microwave and heat full power for two minutes, turn jar 180 degrees and heat 2 more minutes, then stand the jar up on the counter and twist the factory lid (washed with boiling water of course) on and let sit until the ‘pop’ is heard I feed hotdogs to my little raccoon family on these cold nights. The cooked dogs keep for several days. This use has proven to me that the salsa jars and lids are reuseable, several times over.