well...it depends
You realy need to look at your locale, and your needs. For instance, I live in the Carolina's...I don't need much cold weather gear. Also, what is the BOB to enable you to do..,......to Bug Out to Where? I have 2, one in my car[I spend alot of time on the road] to get me from wherever the trouble is[on the road] to HOME. The second one is in my home, to get me out to our farm in the country.
Cover the basics.....ability to make a fire,knife, shelter, water, basic first aid, emergency food, basic tools, flashlight. Most folks get a little carried away on the weapons.....sidearm and a few reloads should do you fine.
Other possibles.....specific medication....my dad had his Thyriod removed a few years ago, and he has to take a Thyriod pill everyday, or he dies. So his vehicle BOB has some spare pills vacuum sealed and tucked away in it.
Good map of the area.
Cordage....550 [parachute] cord works great.
Stop by a hiking store and get a 1 liter "nalgene bottle" with the wide mouth. They usually have those stainless steel camping cups that are sized to fit over the bottom of the bottle. Stuff the bottle with things you want ot keep dry and away from bugs.....mine has a can of chicken noodle soup, some beef jerky, some trail mix, some packets of soy sauce, salt and pepper, Tabasco sauce. Put the food in the Nalgene Bottle, with the cup over the bottom. You now have a mobile kitchen and a durable water bottle.
I keep a "6 pack" of liter water bottles in the trunk of the car beside the BOB. They keep a long time, but I end up drinking them and replacing them once a year or so.
Remember, this is a kit to "BUG OUT" to somewhere else....not to subside for the rest of your days.
I keep a spare box[50 rounds] of pistol ammo in the car BOB.....as I always have my CCW with me...that should cover weapons.
Don't forget, there is NO SUBSTITION for a good knife.....and also remember, folders are just Pre-Broken Fixed Blades. It doesn't have to be expensive, just sturdy.
Something like this will do fine.......
Your BOB needs to be basically disposable.....you shouldn't put anything into it that you need or use on a regular basis...because without a doubt, you will have taken it out and left it someplace else, when you really need it:banghead:
I will admit, the BOB in my car is much smaller and less complete than the one in my basement.
Sorry for rambling....its late.