The present invention relates generally to an oral device, or mouthpiece, for delivering a fluid to the mouth or oropharynx of a user. In one embodiment, the oral device includes an intraoral portion defining intraoral conduits and an extraoral portion. The extraoral portion defines at least one extraoral conduit in flow communication with the intraoral conduits. The extraoral portion is connectable to a fluid supply, wherein the intraoral portions and extraoral portion form a delivery conduit. The delivery conduit includes a one-way valve permitting one directional flow from the extraoral conduit to the intraoral conduits. A method of dispensing a fluid using the oral device is also provided.