“The Pez dispenser is not strictly necessary in fact. It does not transform the nature of the Pez candies in any way except by changing the context in which the candies are eaten; yet even the Pez dispenser’s strictly meaningless labor is still capable of producing value in the context of that labor. A packet of Pez candies in one flavor will always be equal in exchange value with a packet of Pez candies in a different flavor; yet a Pez candy dispensed from a Pez dispenser will in the eyes of most persons have a greater use-value than a candy taken straight from the packet.” (Capital vol 1, first draft)