My automobile BOB is intended for 4 days. I keep 2 Mainstay 2400cal. packages in the bag: 3-4 days food in a pinch. Since I envision this for bugging out and keeping on the move (e.g. to a larger cache).. not setting up any camp.. I picked a food source that required no prep. Also it is tolerant to the heat and cold of storage in my truck.