alternatehistory.com

First of all, I'm amazed we don't have more threads on this.

https://www.alternatehistory.com/forum/threads/wi-earlier-appert-canning-method.338583/

So, one of two options:

- This technique is developed shortly after glass bottling became common, so around the 1600s.

- Its done with ceramic containers instead. That gives us millennia to work with.
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