The present invention relates generally to a thin texture, ready-to-drink, shelf-stable refreshing juicesoy beverage. The apparatus comprises; a combustion system, a means for supplying fuel and an oxidizer, a device for igniting the fuel and oxidizer in order to initiate combustion, and a sensor for determining the current conducted by the combustion process. In this embodiment, the wing member is rotatable upwardly and downwardly relative to the rear head support member to allow the wing member to be rotated vertically from a stowed position to a head support position. In addition to the direct light from the EL element, light that enters the liquid crystal layer is simultaneously used.