A method for labeling a UV-fluorescing substrate includes positioning a UV-fluorescing substrate adjacent to an inkjet material dispenser, and selectively jetting an edible, invisible, non-UV fluorescing ink onto the UV-fluorescing substrate with the inkjet material dispenser. For each of the plurality of the computing systems, a plurality of consumption parameters from at least one measurement device is received. Using the received data, one or more of the prefabricated elements is selected. The extended resilient means is retractable such that the plate exerts a constant force on the bag to expel fluid in a uniform flow rate.