A cooler that only stores drinks on the low end can store 10-litres. For a mini fridge designed to store food/drinks, the storage capacity might be up to 45-litres. The larger sized mini fridges typically have a removable shelf which is height adjustable using grooves on either side of the interior. This allows storing taller items on the bottom or on the inside door, which often has storage for bottles or pints of milk. The upper shelf will store food, and there’s sometimes a freezer box for ice cubes, etc.