the problems experienced when filling water reservoirs , in particular those associated with water - heated mirrors of the prior art , are demonstrated in fig1 . the size of the mirror [ 1 ] may vary , but at least 150 mm of mirror height and 100 mm of width is required to efficiently accommodate the facial reflection when shaving or removing make - up for instance . thus , the function of the equipment dictates that the height and width of the reservoir [ 2 ] must be approximately proportional to those shown in fig1 . in fig1 , the effective area available for water [ 5 ] gathering is the opening [ 3 ] where the water flow [ 4 ] enters the water storage reservoir [ 2 ]. increasing the size of the opening [ 3 ] is not practical for gathering water [ 5 ] from a shower head water flow [ 4 ] because the geometry of the water flow from shower heads does not fit the shape of the reservoir entrance [ 3 ], and to compound this problem the individual water jets are spaced too far apart to supply the water volume needed when only a relatively small gathering aperture is available . fig2 a shows equipment of the present invention where water [ 5 ] gathering features [ 6 ] and cellular water retaining structures [ 7 ] cover the back of the mirror [ 1 ]. the effective area available for water gathering is the area [ 3 a ] where water flow [ 4 ] enters the water storage structures [ 7 ] over a major portion of the mirror back . the water gathering features [ 6 ] are comprised of the spaces between the louvre - like water retaining structures [ 7 ]. the cells bounded by the structures [ 7 ] are filled almost instantly by the water flow [ 4 ] because of their generally open aspect . the copious flow of water into the cells bounded by the retaining structures [ 7 ], and the resultant overflow of the cells , ensures that the initial coldness of the equipment is removed quickly , and the final reservoir of water will be more effective in maintaining a fog - free state for a longer period . it will be appreciated that although louvres are shown in a generally linear configuration in the drawing , the water gathering features and retaining structures can be of any suitable shape . in a further embodiment of the invention , fig3 shows a cellular configuration of water gathering and storage where a large surface area for water gathering is provided by a sponge like material [ 8 ] adjacent the back vertical surface of the mirror [ 1 ]. in this embodiment the cellular spaces [ 9 ] are smaller than the compartments delineated by the water volumes [ 5 ] shown in fig2 , but they both employ the principle of retaining water on the vertical surface of the mirror assembly and thus provide a substantially larger surface area for ingress of water [ 4 ] into the storage means relative to the storage capacity . the sponge material [ 8 ] is charged in much the same way as the compartments [ 7 ] shown in fig2 . in fig4 the mirror body [ 1 ] is provided with cavities [ 10 ] on at least one vertical face of the mirror [ 1 ] in quantities that in combination present a large surface area for filling relative the surface area of the mirror . these holes or cavities may be relatively large or microscopic . microscopic holes may be placed partially through the mirror body or right through the mirror body and may be applied in a density that does not unduly affect the reflective qualities of the mirror .
compact features provide faster and more efficient gathering and storage of a sufficient reservoir of heated water to heat a shaving mirror to non - fogging temperature . the features are arranged on the vertical surfaces of the mirror to enable water to enter the reservoir over a large surface area relative to the mirror size .