Certain examples described herein relate to liquid waste containers delimiting an opening for receiving liquid. The liquid waste container comprises a receptacle for liquid waste and a bistable arrangement having first and second stable states such that when the bistable arrangement is in the first stable state, liquid can be received into the receptacle through the opening, and when the bistable arrangement is in the second stable state, liquid is prevented from exiting the receptacle through the opening. The example liquid waste container further comprises an actuator arranged to engage the bistable arrangement and to cause the bistable arrangement to transition from the first stable state to the second stable state.