If the glass shatters the thermos will feel hot to the touch, also you’ll hear the glass banging around in there, so that’s not a big risk.

No, not really. What I mean is if you break it, you now have asbestos in your environment. Particularly if you screw it apart (which one might do if unaware of the issue)

Isn’t stanley all steel though? I don’t think it is an issue with them.

Hi, it’s Vince…

These kind of thermoses have a replaceable glass liner, so the standard is to replace it when it breaks. Replacement glass liners are still made for some brands today, though asbestos free. The oldschool glass lined thermoses are still semi-common in Finland and are made by a company called Airam. I’ve got one myself.

Not the all glass liners contained asbestos, but some did and there is really no way to tell.

I’d be more worried about the glass liner. Some of those contained asbestos which would be released if it breaks.