I need one but first need to know what its called. shaped like an upside down U whith a mouth piece

hey Melody,

not quite sure what you need, more description would be nice, my best guess is some kind of Incentive Spirometer, (This is a plastic breathing device that will be kept at your bedside. You breathe in deeply, like sucking on a straw, to move the marker in the spirometer up, and hold the breath for a few seconds. This device helps you to breathe deeply and fully expand your lungs.) try searching Spirometer, If its not that, just ad some additional information and ill try to help you. Until then, hope this helped, cya.