I take the concept of a "BOB" as supplies to get you from where you are to where you need to be. Simple enough to get you to where you are out of danger and to your secondary location. Supplies should be available at this second location. For me, I carry Mountian House dehydrated foods. I have tried all of their offerings and have chosen the ones that taste good to me. I normally carry six meals (each meal is designed for two people)in my pack at all times. I can rotate these out every few months ad so far have had no problems. I use a JetBoil stove to heat the water and a Steripen purifier. So far, no problems and I'm set for 3 days or a little longer if I want to ration a bit.