FIG. 1 is a rear perspective view of a first embodiment of the mouthpiece;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a top view thereof, the bottom view thereof being identical;
FIG. 4 is a left side view thereof, the right side view thereof being identical;
FIG. 5 is a rear view thereof; and
FIG. 6 is a front view thereof;
FIG. 7 is a rear perspective view of a second embodiment of the mouthpiece;
FIG. 8 is a front perspective view thereof;
FIG. 9 is a top view thereof, the bottom view thereof being identical;
FIG. 10 is a left side view thereof, the right side view thereof being identical;
FIG. 11 is a rear view thereof; and,
FIG. 12 is a front view thereof.