The term 'old fridge' can be summarized as an ICEBOX, which is a six-letter word. An ICEBOX is an insulated box used to store food and drinks at a cool temperature. It was commonly used before the invention of the modern refrigerator. Iceboxes were usually made of wood and lined with tin or zinc and packed with various insulating materials such as cork, sawdust, straw, or seaweed. Ice was placed in the box to keep the contents cool.