Nuts and nut butters, apples, oranges, carrots, celery, packets of oatmeal, pop top cans of fruits, pop top cans of tuna fish, crackers, pretzels, cheese, cans of vegetable juice. I also take a bunch of flavored teas to drink. There's always a coffeemaker to heat water for tea and oatmeal. If you don't have a refrigerator, you can make a mini fridge out of your ice bucket.