Although a gallon will fit, (these are 5 cu. ft. fridges I believe), I would recomend two 1/2 gallon containers instead. Otherwise, you'll probably have to remove the lower self to allow for the gallon container to fit. Not, a biggie, but ceratinly two 1/2 gallons would be easie to work with. You, may want to hold off buying the milk at the grocery store, check in and check out the fridge for your self, then go to the merchantile off the lobby, and buy your milk there. I know its more expensive, but its only a little bit more $.