Inspector Creuset Jetable on Nostr: The DDR (East Germany) invented “unbreakable” drinking glasses for catering that ...

The DDR (East Germany) invented “unbreakable” drinking glasses for catering that were 5 times harder to break than Western glasses of equivalent thickness. The technology didn’t survive re-unification due to it being “uneconomical” - the “Superfest”glasses were more expensive to produce and because they broke less, you would sell fewer of them.
https://digitalcosmonaut.com/superfest-ceverit-glass-ddr/