Vertical fridges or upright fridges are all fridge appliances, giving you more space for your family's grocery shop. By having the full capacity dedicated to one function, you can have it as an overflow fridge or paired with a vertical or upright freezer, maximising your available storage.True 4-door models are just that—a refrigerator with four hinged doors that form a perfect quadrant. In addition to altering the overall look of the appliance, this new configuration often changes the interior layout and, as a result, the way you interact with your refrigerator.