I've honestly given up on pre-processed bars. I'm constantly on the road during the day traveling to clients and I carry:

-nuts
-babybel cheese
-protein powder and a shaker bottle of water

All of those don't require refrigeration- the babybel is wrapped in wax, so it'll be fine through the day, and I eat it first if I bring it.

I used to make peanut butter/protein powder "cookies" and carry those a lot.