A 12 oz can of coke contains a 12 fluid ouncesvolume of liquid. The weight of the aluminum can plus the weight of the liquid is approximately 13.7 ounces. The weight of the aluminum can is about 0.5 ounces, so the 12 fluid ounce volumeof coke weighs about 13.2 ounces. One fluid ounce of water weighs one ounce, but beverages such as coca cola contain many other ingredients such as sodium, sugar, and carbon dioxide that adds to its weight. Volume measurements such as fluid ounces should not be confused with weight measurements.