Lucy Purr is beginning her day at the Lab, and wants to see how much pressure she can generate. She begins with several very strong efforts using the spirometer mouthpiece, whose lip ring should be able to provide the best possible seal. But when she subsequently tries the tuba mouthpiece, she is pleasantly surprised with the superior result.

Lucy Purr is beginning her day at the Lab, and wants to see how much pressure she can generate. She begins with several very strong efforts using the spirometer mouthpiece, whose lip ring should be able to provide the best possible seal. But when she subsequently tries the tuba mouthpiece, she is pleasantly surprised with the superior result.