bag any of a number of sheet materials have been found suitable fig6 illustrates a single section of paper towelling as removed from supply roll 38 other materials such as individual hand towels nakins newspaper and the like can also be used for this purpose the size of the sanitation sheet 36 should be compatible with the dimensions of the frame elements 12 16 and is generally square in configuration a towel section typically 27 5 u00d7 27 5 cm is used in the preferred embodiment shown the paper towelling has been found to provide the necessary strength and absorbency characteristics for this intended use the manner of attaching the sanitation sheet 36 will now be discussed with reference to fig3 and 6 it should first be noted that the frame elements 12 16 are provided with clasps or retaining clips 40 42 these clips 40 42 may be fabricated of a similar thermoplastic material and formed unitarily with the respective frame elements 12 16 or alternatively other forms of yieldable fasteners may be employed for instance metal spring clips in the preferred embodiment plastic resilient clips 40 42 are formed integrally or secured to the respective frame elements 12 16 by means.