A display which thickness is allowed to be reduced is provided. The device includes a gas source comprising a gas or capable of selectively producing a gas. The illumination subsystem is disposed to illuminate a target space. It is determined whether or not the cylinder in which the abnormal combustion has occurred and which is stored in memory, is a specific cylinder. Both caches administrate auxiliary information indicating whether data present therein is valid. The treat may also be consumed via a spoon-end attached to a straw-lower-section.