Hi there
I had a look into a cockpit one time,just after the skipper had finished his pizza and discarded the box,crumbs and crusts on the floor, the console and every other unoccupied surface. He thought it was a great laugh until the cleaners declined to tidy up his mess and he was compelled to return to his 'pit and clean up.The look of contempt on his FO's face was priceless.
regards
TDD