Buy Magic-Wrap 150 Heavy Duty Aluminium Foil Catering Size 45 cm. Cling film is great for wrapping fresh food. So when next you make a sandwich for your kids, pick up your roll of cling film and wrap it up. It can also be used to wrap half eaten fruits like watermelon, apples or pineapples that have been cut halfway but not fully eaten. The cling film will preserve these foods. Aluminium foil is better for wrapping food that needs to stay warm as the aluminium acts as a form of insulation. Aluminium foil is also perfect for wrapping foods with strong smells; it locks in the smell and keeps it air tight. Every kitchen should have a good supply of plastic film and aluminium foil.