I like to keep three days' of food in our BOBs. For this purpose the lifeboat rations work well.

For a while I kept ER Bars, and I think they're very good for the purpose. After a taste test, I moved to Mainstay bars. Neither are exactly fabulous, but I can't beat these kind of rations for bulk, weight, and long-term storage.

I also have civilian MREs and FSRs for various contingencies, but they're too bulky for BOB use.