1 hour ago, TdeV said:@heidih, links don't seem to work.
Just to be clear, ordinary glass can/cannot be heated in the same way a Bell or other canning jar can?
Sorry - are you not in the US? The Ball jars for instance come with specialed lids that seal. A classic high five is "oh the jars all popped" - sound when they seal as they cool. My jammy friend based on assurances just does the gass in dishwasher and boils the lids. My understanding is that ordinary glass like recycled from marmalade can be touchy.Here is a Ball jar. Aside from that there are numerous sites and books. Like foraging - be safe.