
I rendered with PhotonGI caustic cache because it adds a nice brightness and warmth to the interior parts of the glass and ice, and light tracing for the actual caustics. I had to re-render about 15% of the frames with a different seed value (I also had to modify one of the BlendLuxCore addon files to allow me to automate this) because sometimes the caustic brightness just goes crazy high, and causes intense flickering in an animation.
Render time was about 4 - 5 minutes per frame at 384 samples.
I plan to make a better (more fancy) glass for the whisky later, but right now I lack time and motivation

This is my first contribution to this topic, hope you like it! Feedback welcome.
Short animation: https://youtu.be/_eAn51ynjro