Marketing
Marketing courses teach students that the packaging and labeling of a product are important elements in sales. The term packaging refers to the container in which a product is sold, while labeling refers to the information on the package that describes what it contains, how the product is to be used, and who made it. Marketing courses teach that packaging and labeling are important elements in protecting products, differentiating them from competitors' offerings, and achieving sales. Coca-Cola's easily recognizable contour-shaped bottle, for example, distinguishes it from other soft drinks.

Packaging and labeling are also relevant to legal assent, in that a potential buyer may decide to accept or reject a product on the basis of information on the label. If a box pictures a white microwave but contains a black one, the purchaser would likely not be bound to the sales agreement, because no meeting of the minds existed between buyer and seller at the time of the purchase. A mutual mistake may exist, since the seller was likely mistaken about which product was in the package, and the purchaser was mistaken about its color based on the label.

A label may also contain terms of a warranty that could entice consumers to purchase one microwave over another. A label that states a consumer is entitled to a complete two-year replacement warranty is binding on both parties at the time of purchase.

Source: R. Kerin, S. Hartley, E. Berkowitz, and W. Rudelius, Marketing 7^th edition (New York: McGraw-Hill/Irwin, 2005), pp. 307–308.