Dairy products such as fluid milk, cream, sour cream, ice cream, and ice milk are being confronted with competition from substitute products. Generally, substitutes contain vegetable fat in place of milk fat in regular dairy products. Some substitutes do not contain any dairy ingredients. Prices and marketing margins for the substitutes are typically lower than those for the traditional dairy item. They tend to reflect the wide difference in the cost of milk fat as compared to the cost of vegetable fats.