Mini-fridge
Mini-fridges are a good way to keep food fresh (be the food mini or normal sized). Columbia has a size limit (2 cu ft) on the volume of the mini fridge, but this is rarely, if ever, enforced.
Always remember that mini-fridges never keep ice cream frozen, but occasionally do freeze the sides of water bottles that touch the ice maker.
Rentals
Columbia offers yearly/semesterly rentals of mini fridges as well.