I always tuck cereal boxes, fruit bars, and other snacks in my suitcases. I tend to not put them all in one place, in case something happens to the bag. I even packed bananas last year! We had cheap, good breakfast food and plenty of room for souvenirs when we returned. No problems!
BTW, I *NEVER* pack liquids in my suitcase. It's a no-no (could rupture and damage not only mine, but other people's luggage). If I bring juice or water, it's in a carry-on.