I almost bought this yesterday at Walmart. I unzipped all the pockets & it has many places for tools or lipos or spares. It's a gun field bag but it looked completely versatile to be a RC field bag. The inside was large enough for 3 transmitters. Lots of little sewn in pockets everywhere. Very well made.
https://www.walmart.com/ip/753949015
We aren’t racers and we don’t go any where but the back yard to run ours, but this is what I got for our parts and tools. Won’t fit a car but works good. Plenty of various size insert boxes for storage/organizing.
https://www.academy.com/p/okeechobee-fats-t1200-series-tackle-bag