A covering device having first, second, and third bores in which first, second, and third portions of tubing, respectively, of a stethoscope can be inserted when the covering device is attached to the stethoscope in a first state. Each of the first, second, and third bores may have a length and a width, wherein the length of each of the first, second, and third bores is greater than its width, and wherein the width of each of the first, second and third bores is less than the outer diameter of a diaphragm device of the stethoscope. The covering device may have first, second, and third slits, each of which can be pried open to allow the first, second, and third portions of tubing to be inserted into the first, second, and third bores of the covering device, respectively.