The price of a cappuccino at any given coffee shop can be more than double the price of a regular coffee with milk that is in a container of the same size. The basic ingredients of both products are identical, but the milk in the cappuccino will have been frothed up with pressurized steam. Is this one difference in the cost of production sufficient to explain the price differential, or is it more likely that consumers of cappuccinos subsidize the consumers of regular coffee by paying exorbitant prices?