Hey!
That seems very odd indeed, and tried to get that error out of the bottle so I already did some testing prior to the rendering. Everything seems normal in a simple scene lit with a HDRI, also when I place a 3ds max capsule in place of the bottle with the same material attached (and ofcourse basic corona physical water preset) I get the same result. So I ended up just accepting this.
Nevertheless, thanks for noticing!
