Trade dress consists of the overall image of a product and may include features such as size, shape, color or color combinations, texture, graphics, etc. Trade dress may even include the displays attending goods, and the decor or environment in which a service is provided. As long as the particular feature in question meets the requirements of distinctiveness in trademark law, that feature receives protection.
Only those elements designed specifically to distinguish the product are protected; not the functional features of trade dress that have a utilitarian purpose. See functionality doctrine for more information on this subject.