Disappointingly, it doesn't really lend itself to an amusing pun.
Proving that there’s never too many ways to do something in a ridiculous manner, and following renditions in toast and in Post-It Notes, attention-seeking promotional types at a Sydney coffee festival have elected to recreate DaVinci’s famous portrait of the wife of a Florentian silk merchant through the medium of lots of little cups of coffee.
“The Mona Lisa has been reproduced so many times in so many different mediums but, as far as we know, never out of coffee.”
Ignorant pillocks.
Everyone knows that the plural of “medium” is “media”.
[The Telegraph, via Derren Brown's Blog]