Applicable Surfaces : This soap bar holder is only suitable for smooth , non porous surfaces , like metal , glass , ceramic tile , stainless steel , acrylic , and more , not applicable to uneven tiles , textured boards , unfinished marbles , wallpaper , painted walls , etc Widely Used : This suction soap dish is suitable for kitchens , bathrooms , showers and other kinds of wet spaces No Drilling Installation : This suction cup soap dish can be installed in seconds by simply rotating the suction cup vertically clockwise and screwing it on tightly without drilling holes , no screws , glue or any tools are required Quality ABS : This suction cup soap holder is constructed of quality thickened ABS with excellent endurance , waterproof , can hold up to 11 pounds , and long service life Draining Design : There are multiple drainage holes on this shower soap holder to avoid water buildup . The lower sealed bottom stops the soap from dissolving and falling out of the holes and absorbs the drained water to avoid staining your floors