This set of disposable supplies consists of a tongue depressor, an ear specular and a stethoscope. The tongue depressor is used to check the throat. The ear specular is used to check the ears and may be printed in different sizes.
The stethoscope can check the lungs, heart and abdomen organs. Although this model of the stethoscope is old, and is not in common use now, I think that it can be helpful in extreme situations like a trip to Mars.
You can recycle all of these supplies to get plastic for the 3D printer to print them again.