A toothbrush holder that includes, among other features and capabilities, a holder base plate mountable on a planar surface such as a wall or a mirror and that is formed with a plurality of toothbrush retaining troughs. The eye protection device includes an open face frame, a lens frame with a lens coupled thereto, and means for coupling the lens frame to the open face frame, wherein the lens frame, if pivotally coupled, may be selectively positionable with respect to the open face frame, and has one or more antifogging passageways. The period of refractive index of chirped grating becomes the shortest on the side closer to the semiconductor light-emitting device and successively expands along the propagating direction of laser light. The description of a \u201cmeeting,\u201d for example, may be stored once. The coupling is connected on the interior side of the external wall to a delivery pipe that connects to a fuel bin for storing the biomass fuel.