Campbell Soup Company is voluntarily recalling one day's production, 19,792 cases (12 cans in a case), of its 18.7 ounce cans of soup labeled Campbell's Ready To Serve Classic Tomato because it may contain undeclared milk and soy protein. People who have an allergy or severe sensitivity to milk and/or soy proteins run the risk of serious or life-threatening allergic reaction if they consume these products.