Right but is your family an outlier or an average? Anecdotes are not evidence, and what matters is how everything would pan out in the real world.

When we were using glass jars for everything, it's not like glass jars were not actively being produced. I don't think these are unanswerable questions but i highly doubt it's as simple as "replace plastic with glass". Aluminum may be a better solution, one that doesn't use up a lot of sand, for example.