The invention relates to a cooking vessel (1) comprising a cap (2) equipped with an end wall (3). According to the invention, the end wall (3) comprises a housing (6) accomodating at least one bimetallic element (30a, 30b) that adopts a cold stable first position when the temperature is below a predetermined temperature and toggles into a hot stable second position when the temperature is above the predetermined temperature, and vice versa, the transition from the first stable position to the second stable position generating an audible signal designed to be perceived by a user or by an external device.