US Patent 7892327 Portable humidifying device and method for using same

Apparatuses for controlling a humidity level within an enclosed volume storage device and methods for using same. The apparatus, in one embodiment, comprises a container having outer walls defining an inner volume, at least one of the outer walls, preferably an lid wall, having perforations therein. The apparatus further comprises a composition capable of adsorbing and desorbing water and contained in the inner volume of the container. The composition is hydrated to a hydration level less than about 0.13 mL water per gram of the composition. The methods include a step of hydrating the composition in an apparatus of the invention to a hydration level less than about 0.13 mL water per gram of composition.