| CPC A61C 19/063 (2013.01) [A61C 17/024 (2019.05)] | 19 Claims |

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1. A mouthpiece for distribution of a liquid in a user's mouth, the mouthpiece comprising:
an inlet for a tube;
at least two outlets; and
a single internal channel that fluidically connects the at least two outlets to each other and to the inlet,
wherein the mouthpiece is configured to be positioned within a superior vestibule of the user's mouth apical to a gingival margin,
wherein the mouthpiece is formed of two sheets that are bonded together, apart from in an unfixed region that defines the internal channel, such that a thickness of the mouthpiece is less than 1.0 mm,
wherein a width of the mouthpiece is between 0.6 cm and 1.0 cm, and
wherein a width of the internal channel is in a range of 1 mm to 3 mm.
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