Cup of Booze Problem. Can't get the transparency to look right. What am I doing wrong?

So there is the cup. There is the booze. But it clearly doesn't look right. Any suggestions on what I'm doing wrong? Please help!

 

Additional information I'm using a glass shader. The main advice I need is whether to model the glass in a certain way or do something specific with the textures?

 

How does both objects (the booze part and the glass part) look separate? Make the materials good looking on there own, Try different shader and find one that fits.