Sierra wants to see which mouthpiece is most comfortable and effective for her blowing duties at the Lab. She has already noticed that she has difficulty getting her voluptuous lips to seal around the SDI Comfit (R) spirometer mouthpiece, so she is eager to try out the tuba mouthpiece as an alternative. The thick agate balloons provide enough of a challenge to make this interesting, and she has also chosen to forego a check valve in order to practice her breath control. While her cheeks expand bigger and tighter with every puff, she manages to hold on to each balloon until the end! Which mo...

Sierra wants to see which mouthpiece is most comfortable and effective for her blowing duties at the Lab. She has already noticed that she has difficulty getting her voluptuous lips to seal around the SDI Comfit (R) spirometer mouthpiece, so she is eager to try out the tuba mouthpiece as an alternative. The thick agate balloons provide enough of a challenge to make this interesting, and she has also chosen to forego a check valve in order to practice her breath control. While her cheeks expand bigger and tighter with every puff, she manages to hold on to each balloon until the end! Which mouthpiece will she choose?