Abstract: A method of vending a containerized product using multiple fillings of the same container. The method includes the steps of placing machine-readable indicia on the container indicative of the price charged for both the container and the product contained therein, and at the time of placement of said indicia, or subsequently to such placement, including at a location adjacent said indicia, a stimulus-responsive machine-readable indicator capable of responding to a stimulus to undergo a change of state which is readable, conjunctively with said indicia, by a machine, to indicate a price to be charged solely for the product in the refilled container.