Been making solid progress on implementing containers through modding, wanted to share what I have so far.
https://www.youtube.com/watch?v=rQQu_Ndc1kcDesignating an item as a container:
.TestContainer. "Hunting Horn" *COMMON* [effort:0] /0m/
[SKILL:CONTAINER]
Hotkey: Shift+O - Opens container menu
Supports multi item selection & send
Save & load item data to files, based on the containers item ID