The term 'Sardine Container' CAN be broken down into two words, 'TIN' and 'CAN'. TIN is a metal that has been used for centuries to store food. It is lightweight, durable, and non-reactive, making it an ideal material for food storage. Canning is a method of preserving food in airtight containers, usually made of TIN or aluminum. Cans are often used to store sardines, as they provide an airtight seal that keeps the fish fresh.