Angel Barracks has new 6mm hex containers
Angel Barracks has new 6mm hex containers available over on their website (scroll to the bottom of the page).
From the website:
Pack of 3 cargo containers.
Great for use as shipping containers as used by Hex2Go or as temporary shelters or cheap living space as used by HexHabs
These are sold singly, but you have to admit, they do look cool all stacked up.