I was adding a condensation normal Map to the cup near the rim. I was doing this in material preview which made nothing look wrong. Then when I did a test render it didn't look correct. Like the bottom half of the liquid was cut off and that for some reason the condensation texture was there.
It's like the bottom portion of the liquid material I had inside somehow got removed during the UV editing. I've looked at the UV tab, shading tab, and all through my materials tab and I can't find what caused the problem. Nothing looks wrong in the material preview mode which is even more confusing. I haven't been able to find anyone with similar problems.
I am relatively new to Blender so don't be surprised if it is something fairly obvious.