3 variants of container I have modelled and textured for SCP: Fragmented Minds, based off the concepts by Ben Kiefaber:
https://www.artstation.com/bk8111
All 3 variants have the same measurements allowing them to be stacked on top of eachother and for cranes and trucks to interact with them equally. The creature and cargo container both have an interior to be used in specific engagements or to provide areas to loot.
Find out more about the game here: https://www.hstgamestudios.com/