Tin cans, also called bi-metal cans, are used for soup, tuna, pet food, vegetables, and juice, for example. Foil is also recycled in this category, and would include pie plates and clean aluminium foil.
To prepare tin cans for recycling, just rinse them clean.
What is it? Wikipedia says:
Bimetal refers to an object that is composed of two separate metals joined together. Instead of being a mixture of two or more metals, like alloys, bimetallic objects consist of layers of different metals … For example, tin cans consist of steel covered with tin. The tin prevents the can from rusting.