I am at beginner level. One of the projects I am doing is to create a glass with fluid. Like a glass of water or a glass of wine. Now I can find quite some tutorials on how to create the glass, but very few if any on how to create the fluid (with a realistic result). I am not looking for the water /wine flowing into the glass to get something like this:

[![enter image description here][1]][1] 

The question is not (only) about modelling the fluid, but especially how make the fluid look realistic colours, transparency, specularity, dark/light colours etc.

  [1]: https://i.sstatic.net/KzPSy.jpg