Great pictures! I think there's a "step" in the bottom, where the front two inches or so are lower than the back. That would be good for being able keep change or small loose items in there and still grab them easily.
Me too! in response to another thread, I started a sheet to collect results from anyone who has been able to try them out.
https://www.mavericktruckclub.com/forum/threads/which-water-bottles-fit-in-the-door-pocket-enter-your-results-here.1614/
If you have tried your bottle in the Maverick doors, add your results to the sheet below. Let's find out the practical dimensions of that door pocket bottle storage feature.
Enter your data here: https://forms.gle/BrPBcejwA1a7uNsB7
And read the results here: