Ah, I see what you mean.
To get the wavy look into the glass you can simply add a very low scale noise texture with low detail and roughness to a bump node and add it to the normal. Then play with the strength until you see the desired effect.
The bubbles could be a bit more challenging, as they are basically objects within the volume of the glass. Hm…
Actually this method could work pretty well: Bubble Glass
It’s not shader based, but probably the best effect you can get.
