These 'pods' are by Paris Renfroe of Renfroe Designs. He's made these modern Container pods for your modern dollhouse people to attach together and live in- note the ladder to get to the next pod? A truly unique dollhouse could be created using these! Make sure to check out the links to see more photos!
"The M112 POD is a miniature 1:12 scale replica of an actual shipping container that has been converted into a living space. Abandoned shipping containers are fast becoming a usable resource in green building and are being used in condo, hotel, dorm, commercial, and residential construction."