The doo-dad that our good friend Captain Spam refers to is a mask. But it may do the job. The proper way to handle the complete problem is to install a pressure-balanced shower valve. The experience is from trying to make a quick buck. I don't want to knock the technology of the magnets. But my experience on the jobsite has not to up one of these magnetic gizmo's yet. You sgould save the spam artistry for the paid programs channels.