DAZStudio 4.6 / Reality 4 / Luxrender 1.3.1 / PS#Reality_plugin
I modeled the glass and created the fluid simulation in Blender 2.72. I was waiting for Reality 4 to be released to give this a whirl. I exported the glass and liquid in DAZStudio in OBJ format and imported them into DAZStudio for compo. I used the new volumes in Reality 4 for the liquid and the glass as well. The absorption color combined with the absorption scale work magic especially on the liquid.
Love the new Reality 4!