Styrofoam cup + sharpie markers + a lot of people who have been on the same ship for 17 days = good fun!  Bags and bags of decorated cups were lovingly packed into old onion bags and strapped to all the structures headed for the deep.  When they come back to the surface, the cups are tiny, shrunken art pieces.  People sorted through the pile of feather-light souveniers to find their creations and admire the effects the pressure of the deep ocean had on the vessels.  I like to think of all these miniature tokens spread around the world, quiet little testaments to the amazing work that has been done on this expedition.  Maybe a Styrofoam cup reunion in 20 years?  Just a thought…