This concept (?) fridge from Electrolux uses modular stacking mini-units to provide personal refrigeration compartments for everyone in the household — it's designed for shared student accomodation:
Happy flatshares often fall apart over the politics of the shared fridge. There's always a flatmate with low hygiene standards and another with light fingers and a baked bean addiction. With the Flatshare fridge, everyone gets there own very separate compartment that still has a tall section for bottles and a smaller side for veg and there can be no arguments about who's turn it is to clean it out. When another flatmate moves in, thay can simply buy another unit to go on top.