We used this on our trip to Yellowstone this summer and I loved it. (We put in wet diapers, banana peels, chewed gum (at least what did not fall on the floor :) The pop open made of the lid made it easy to use and kept all odors inside. This idea was a real find.
While we were waiting for lunch at a restaurant this summer, I noticed Hilary and Lincoln playing TIC TAC TOE. With silverware and sugar packets. It kept our wiggly Lincoln in his seat, and looked fun.