At some point in his painting, Wilson happened by with a mug of an espresso grade Jamacian Blue Mountain (http://www.bluemountaincoffee.com/customer/product.php?productid=3&cat=6&page=1) coffee.

It would probably be horrifically dangerous to drink but it smelled really really good.

For the record he wasn't trying to be sneaky -the scent of coffee would negate that- but he didn't try for the stupid small talk either. Just, put the mug down were Vader could get to it.