My 2 cents;
The vehicle B.O.B. that you talk about, I prefer to call it a "Get Home Bag". A B.O.B. varies in its contents, based upon your individual needs.
Meaning,, its put together based upon your environment, daily routine (very important), physical needs & the vehicle your using(carrying this bag in). The "vehicle bag" is intended to get you home. It is different than a B.O.B. used for evacuation .

A Joe Teti bag may very well have a lot of good tools included in it, but may be lacking for your daily routine. When I plan on driving/renting a vehicle in another state, for example when I travel from Dallas to El Paso, I place a bag in my checked luggage that reflects my needs or concerns for that environment. Water, food can be obtained, when I get the car.