Novel Myofunctional Water Bottle to Reduce OSA and Snoring Study

Inclusion Criteria: * Diagnosis of mild to moderate obstructive sleep apnea with Apnea Hypopnea Index 5-29 events/hour confirmed within last 2 years with an in-lab diagnostic polysomnography or home sleep apnea test. * Ownership of a smartphone and willingness to use a smartphone application to automatic log daily water intake. * Willingness and ability to discontinue the currently prescribed OSA treatment for at least 3 days prior to testing. * Age greater than or equal to 18 years. * Participants willing to travel to the Rochester area for the Speech and Language Pathologist exam Exclusion Criteria: * Significant weight change (10% change in body weight in Kg) from the time of the OSA diagnosis until the study initiation. * Persistent excessive daytime sleepiness (Epworth Sleepiness scale \> 10), despite treatment of OSA * Significant medical comorbidities requiring restricted oral fluid intake - decompensated heart failure, end stage renal disease, end stage liver disease, hyponatremia (S. Na \<130 mg/dl), nocturia \> times/night. * Significant mental health comorbidities including history of psychogenic polydipsia, obsessive-compulsive behavior, current suicidal ideation and uncontrolled anxiety. * Unable or unwilling to participate in study procedures. * Previous upper airway surgeries significantly modifying upper airway anatomy. * Known congenital or acquired diseases significantly affecting upper airway anatomy. * BMI \>40 kg/m\^2. * Currently treating OSA with hyp…