Modifies another tool tray to be more compact with the tools I use the most. I use a small 2oz sprayer which I fill with 91% Isopropyl Alcohol for bed cleaning link below, it fits perfectly in this space.
https://www.walmart.com/ip/Equate-Travel-2-fl-oz-Fingertip-Plastic-Sprayer-Various-Colors/196306543
The author remixed this model.
This version is more compact.