For a while, I have been trying to render tea. I have no idea why, but I was really fighting to get the colour of the tea itself correct. I think there may be a tinge bit of too much orange, but I am happy with the result.
Bella yet again provides amazing results, I think.
AmbientCG: PBRs for side surface and placemat
Polyhaven: HDRi map.
EDIT: I have updated the image to include the following:
Improved milk material properties (thanks @jdhill )
Many thanks. It is a terrible burden that we must carry in the UK, that beyond all other engineering and chemical standards; daily conformance to [BS] ISO 3103 is the most important achievement.