This is will be the last one, and my final glass shader, which I think works fine for my needs at least :D

So I manage to make them more clear and also add a nice more defined edge to them, which I like, especially on the foot.

Seems to also work with the other glasses as well, which is very nice.

And as a final test I tried turning off the light and load in a 16k Hdri with different light settings. And think it looks fine the glass seems to behave as expected, so very happy for that :D

The final shader can be seen here, and yes have absolutely no idea what is going on in it :D