Rinsing glass filling arrangement for filling a rinsing glass provided on a dental treatment station, having a setting-down element having a setting-down surface for the rinsing glass, means for supplying a liquid to the rinsing glass, said means having a supply pipe, and means for detecting the fill level of the rinsing glass, wherein the means for detecting the fill level of the rinsing glass are designed to detect the fill level using sound, wherein the means for detecting the fill level have a sound generator, a sensor and an evaluation unit, wherein the evaluation unit is designed to determine the fill level of the rinsing glass on the basis of the sound signals detected by the sensor, wherein the means for detecting the fill level furthermore have transmission means that • firstly direct the sound generated by the sound generator onto a region in which the rinsing glass is to be positioned, and • secondly convey reflected sound or sound transmitted by the rinsing glass to the sensor, wherein the transmission means have at least one bore that is designed to convey the sound generated by the sound generator and at least partly follows the supply pipe, wherein the supply pipe for the liquid and the at least one bore (8, 8') used to transmit the sound form an integrally formed structural unit, characterized in that the supply pipe is arranged on the setting-down element for the rinsing glass and has a first part that extends upwards, and a second part that adjoins the upper end of the first part, is curved and ends in a downwardly oriented dispensing opening via which the liquid leaves the supply pipe, wherein the downwardly oriented dispensing opening is located vertically above the rinsing glass when said rinsing glass is positioned as intended on the setting-down surface. a setting-down element having a setting-down surface for the rinsing glass, means for supplying a liquid to the rinsing glass, said means having a supply pipe, and means for detecting the fill level of the rinsing glass, wherein the means for detecting the fill level of the rinsing glass are designed to detect the fill level using sound, wherein the means for detecting the fill level have a sound generator, a sensor and an evaluation unit, wherein the evaluation unit is designed to determine the fill level of the rinsing glass on the basis of the sound signals detected by the sensor, wherein the means for detecting the fill level furthermore have transmission means that • firstly direct the sound generated by the sound generator onto a region in which the rinsing glass is to be positioned, and • secondly convey reflected sound or sound transmitted by the rinsing glass to the sensor, • firstly direct the sound generated by the sound generator onto a region in which the rinsing glass is to be positioned, and • secondly convey reflected sound or sound transmitted by the rinsing glass to the sensor, wherein the transmission means have at least one bore that is designed to convey the sound generated by the sound generator and at least partly follows the supply pipe, wherein the supply pipe for the liquid and the at least one bore (8, 8') used to transmit the sound form an integrally formed structural unit, characterized in that the supply pipe is arranged on the setting-down element for the rinsing glass and has a first part that extends upwards, and a second part that adjoins the upper end of the first part, is curved and ends in a downwardly oriented dispensing opening via which the liquid leaves the supply pipe, wherein the downwardly oriented dispensing opening is located vertically above the rinsing glass when said rinsing glass is positioned as intended on the setting-down surface.