A combination includes a container of product having a longitudinal dimension and a valve oriented to discharge product generally longitudinally from the container. A buffer layer, an n-type GaN layer, an InGaN emission layer, and a p-type GaN layer are laminated on a sapphire substrate in a semiconductor light-emitting element. The database table contains a security label column within which is recorded a security label that is defined within a hierarchical security scheme. A controller is programmed to monitor the liquid level in the reservoir such that the controller will operate the primary fill pump and the primary drain pump to control the liquid level in the reservoir in a predetermined manner. Then, the resist film is left only in the pixel-electrode forming region and the resist film is removed from other regions. A first electrode and a second electrode are formed to electrically connect with the first semiconductor layer and the second semiconductor pre-layer respectively.