Devices capable of holding a large amount of cosmetic product, applying a large amount of the cosmetic product to keratinous fibers without leaving clumps of cosmetic product on the keratinous fibers, while also separating individual keratinous fibers, are provided. An insulation material proposed for use at temperatures of more than 130\xb0 C. In forming the sealing member, a ring-shaped portion that seals the liquid crystal layer inside the sealing member, a first sealing layer and a second sealing layer that face each other to be separated from each other are formed. The amount of the lubricant oil supplied varies depending on the rotational speed of the rolling bearing assembly.