We usually leave whatever is left on the table and if there is any perishables we leave them in the refrigerater. I dont think I would use anything that is left even if it wasn't opened because of the way we are taught to think now. Its just to wierd nowadays, just when you think something could not happen it does. I can't imagine that Disney would allow housekeeping to leave anything in the room on purpose. I appreciate the fact that someone doesn't want anything to go to waste but sometimes planning doesn't always work.