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It is called a "tin" can for a reason. Most are composed of a thin layer of tin over steel. Touch a magnet to it. The tin is less reactive to most foods so it prevents the food from tasting funny. It also prevents the steel from rusting.

Some acidic foods, such as pineapple and tomatoes, have cans with a zinc or plastic coating inside to prevent the acid from reacting with the metal.

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12y ago

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