A first light source producing a first light beam with a first intensity and a second light source producing a second light beam with a second intensity. The fluid ejector head further includes, a fluid ejector actuator in fluid communication with the at least one nozzle, wherein activation of the fluid ejector actuator ejects a fluid through the at least one nozzle at controlled locations onto the interior surface of the enclosing medium. The latter have direct access to the gateway for monitoring supplier and retailer accesses and to the database for logging purposes.