Abstract: A drinking apparatus comprising a receptacle (2) and a sensor module (4); wherein the sensor module can also be decoupled from the receptacle to allow the receptacle to be cleaned separately from the sensor module; the sensor module comprising an alert system which is able, when the sensor module is coupled to the receptacle, to detect a reorientation of the drinking apparatus into a second, cleaning, orientation in which the mouth of the receptacle is angled downwards; the alert system being configured to generate a warning signal on detection of a reorientation of the drinking apparatus into the second, cleaning, orientation to warn a user against cleaning the drinking apparatus while the sensor module remains coupled to the receptacle.