I'm at a movie theater with my brothers Steve and Joe. They go on into the movie, and I stop at the snack bar to get a drink first. I buy a large soft drink, and after I fill it up and the self-filling station I realize they have no lids for this size, apparently they just ran out. This makes me irrationally angry - of course I want a lid, why would they sell me a drink knowing they have no lids! They refund my money with a large handful of change, which I then give back to them to buy three smaller drinks. I think I should get some for Joe and Steve, so I consider what combination of drinks would likely be best at satisfying everyone.