Anti-snoring devices. From left to right the devices are; a mouthpiece, nasal dilators and a tongue retainer. The mouthpiece prevents the tongue from dropping to the back of the throat during sleep, therefore maintaining an open airway preventing snoring. The nasal dilators sit inside the nasal passages and hold them open, maintaining airflow. The tongue dilator uses suction to hold the tongue in a forward position to maintain an open airway. These devices may work for some people, depending upon the underlying cause of the snoring.