A suitable Lid made of stainless steel for an ultrasonic bath protects the bath liquid from external contamination and prevents unpleasant odours caused by added cleaning or disinfection agents. In addition, the noise emission that might be perceived as disturbing is reduced when operating the ultrasonic cleaner. The Lids are designed in such a way that any condensation water that arises is returned to the bath. A suitable Lid made of stainless steel for an ultrasonic bath protects the bath liquid from external contamination and prevents unpleasant odours caused by added cleaning or disinfection agents. In addition, the noise emission that might be perceived as disturbing is reduced when operating the ultrasonic cleaner. The Lids are designed in such a way that any condensation water that arises is returned to the bath.