en.wikipedia.org › wiki › Steel_and_tin_cansSteel and tin cans - Wikipedia In parts of the world using the metric system, tins are made in 250, 500, 750 ml and 1 L sizes (250 ml is approximately 1 cup or 8 ounces).Cans imported from the USA often have odd sizes such as 3.8 L (1 US gallon), 1.9 L (1/2 US gallon), and 946 ml (2 US pints / 1 quart).