Hi Luano. Some rapid tips: 1.- Change glass material to glass shader, Type Beckmann, Color (1,1,1), IOR 1.650. 2.- Use glare (filter node) in render compositing to get the image clearer (Streaks, Medium, Threshold 0.02, Fade 0.882). Your render will be much better.

And: 3.- Change dropped wine material for: Mix shader (factor 0.6) First: Velvet shader (Color same red as other wine, Sigma 0.7) Second: Glass shader (Color (1,1,1), IOR 1.5, Type Beckmann)

I changed everything as you suggested and now it looks much much better! Thanks for the glare tip, you made me discover the composite nodes! :) Right now it is rendering, still too slow though...

It looks much better! The dropped wine could be improved, but we should make some tests. The cup's mesh have a problem. There are some vertex layers overlapped. To get a correct glass render, the cup mesh should be clean, without interior edges/vertexs.