Nurses expect nothing for the care we give, but we do love snacks. There are many days when we never get to stop and eat a real meal. As a nurse manager of an ICU and ER, I keep a drawer in their break room filled with peanut butter crackers, peanuts, cheese crackers, granola bars, etc that they can grab and eat whenever they get a minute or two.
Good luck! Whatever you chose, they will love it. Hopefully Lily gets to come home soon.