I painted the fridge tray panel yesterday, the paint is dry so here is it painted/installed and with some Molle pouches on it:
Appropriately, these are what the Army calls "Sustainment Pouches", intended to hold food while in the field.
In these next photos I've got a 10 liter (2.6 gallon) Rubican installed, with a spigot for dispensing water. There are several sets of mounting holes for the Rubican, I've mounted it in the rearmost set so the spigot doesn't stick out past the fridge.
The Rubican is mounted high enough that gravity will allow it to serve as a source for a sink faucet. Maybe I'll do a sink next.