Stain Free, No Mess Snack Foods?

I am currently in a Play and our first performance is Friday the 17th of April. During scene changes a lot of us get hungry but don't have time to go out for food. I made the suggestion that we should bring food to keep in the green room where there is a fridge, a microwave, sink and tables. The only problem is our costumes. There will be little to NO time to change out of them and our director and costume designer will literally KILL us if we get them dirty or stained. What we need is a variety of filling snacks that have no chance of staining costumes if accidently spilled. They can't be greasy or cause too many crumbs. Also, a good deal of us have parts that require screaming or yelling and our throats get sore, so the less salt the better.

I had already thought about some of that flavored carbonated water that is so popular, and maybe some carrot sticks and raisins, but the play is long and I would like to come up with something a bit more hunger satisfying.

Any ideas or suggestions would be wonderful.

Thank you.