Purse Food: Any food that can be easily stored in a zip lock bag or other small container, and will not spoil if it is carried around for several hours. Nothing too messy either, and best if it can be eaten with your hands.
Examples: pretzels, chex mix, fruit, yogurt (& plastic spoon), granola bars, fruit snacks, crackers, string cheese, jerky.
Purse food is a staple, and always has been since I started college. It is my way of trying to avoid buying fast food, and I have to say that it works quite well.
My shopping list always has "purse food" written on it, and Nathan even knows what that means... hunt around until you find something portable, buy it, bag it, and then grab it when I have to head out the door.
I love you, purse food.