Plastic Storage Container, Set of 2. ForMDF-U730 / 731M. The capacity of a MDF-U730 / 731M Freezer is one Set of 2 per shelf. 4 Shelves as standard in the Freezer. To completely fill the freezer, purchase one extra set of MDF T07ST (set of 3 shelves) and 7 sets of 2 MDF T07SC Containers. (for use in the UK only)