The next chapter in bar storage We've turned the page on soggy haircare bars that become one with coasters or sink into wire & bamboo shower caddies. Pairs with (2) life preserver stands (sold separately) This wall adapter takes the bars off the shelf and onto the wall away from the stream of water. Works only on glass, porcelain, polished ceramic, marble, or flat, non-porous tile. Does not stick to stone or across grout lines. Easy install: twist-lock suction cup! No tools. No damage. Renters' delight! this rack is intended for non-porous surfaces only (glass and smooth tile). Not recommended for: heavy textured or small tiled walls. Will you ever lay your bars flat again?