An apparatus and method capable of performing multiple tasks in a portable terminal are provided, in which menu functions of the portable terminal can be implemented while continuing to play the music. The system includes a container and a flexible vented package containing a liquid, semi-solid or liquidsolid combination comestible. The transistors 101 and 102 each include a gate electrode, a gate insulating layer, a first oxide semiconductor layer, a second oxide semiconductor layer, a source electrode, and a drain electrode.