A container for a liquid containing bag. The light detecting portion is provided on the first substrate or on the second substrate and includes a first optical sensor, a second optical sensor, a first electrode, a second electrode, and an electric potential applying portion. Related wireless terminals are also discussed. In a particular embodiment, the plurality of solid density values produced by the press output device are varied approximately linearly in density along a first axis, the first axis approximately perpendicular to direction in which output of the press output device is produced. The core portion 20 contains an alkali metal at an average concentration of 5 atomic ppm or more. Two-terminal devices may be formed as well as devices with multiple terminations on a given bottom surface of the device.