Pack a whole apple in your bag. Smear peanut, almond, cashew — whatever butter you are into — onto your crispbread. Drape a small sheet of plastic wrap over the nut butter so it doesn't smear all over, then pack it up. At snack time, thinly slice your apple, and drizzle with honey and cinnamon, which you hopefully have at work. You can substitute the apple for a banana to mix things up.