Hi all, after your suggestions and some re-thinking, and thanx to the prorogation given by AgentS, this is my re-worked challenge entry.

I've changed the DOF center to bring out the ants in the foreground and this time rendered it at 64rpp instead of 36 to get rid of some graininess.

Requirements are the same as before:
Metaballs: Major part of the ants, spilled coke liquid.
Photo textures: Floor, coke, camelpack, pizza
Terrain/lattice object: pizza
Imports: TonyLynch's chairs, coke can.
Postwork for slight color correction.

Later I will post a full res (1100x880) version in the gallery.

Thanx a lot again for the suggestions.
Stefano