“A good mouthpiece is of such immense value to a brass instrumentalist that he should take every precaution to protect it against loss or damage.  It is highly inadvisable to leave the mouthpiece in the instrument or case.  The player should have his mouthpiece with him at all times, but if carried loose in the pocket, it is very liable to be scratched, bent, or chocked up.  A mouthpiece case is an absolute necessity and you cannot find a better one that that illustrated above.”