Last night I quickly did an espresso mug. Tossed it into B6 for a quick test render to see how things might look. The foam is a mess.... I'm working on fixing that. Beer foam tutorials don't seem to be of the right type of texture. I am now debating whether the correct approach would be to take close up photos of read espresso and try to map that to the surface of the drink.

Note, though, things are not completely to scale. Some of the mug's details are lost... especially the interior of the glass--there's a one inch space of thick glass at the base, above the chrome part. I have not finished modeling this mug... the handle isn't yet done.

Any advice dealing with the foam would be really really appreciated.