The invention relates to a device (1) for receiving liquids in an aircraft and/or releasing liquids therefrom, especially during the flight, said device being arranged especially in an airplane. The aim of the invention is to provide a device which can receive large quantities of liquids in a rapid, reliable and flexible manner. To this end, said device comprises a tank module (2) provided with at least one tank container (6) that is connected to a collector (8) by means of at least one connecting shaft (7), a bulkhead module (3) that can be connected to the tank module by means of the collecting tank and comprises a closing element (9) by which means, in the open position, liquids are released from the tank module, a refueling module (4) which is connected to the tank module by means of at least one supply line (10), and a tube which is arranged on a winding device (11) and comprises a receiving element (13) provided with at least one opening (14) which receives liquids released from the aircraft, so that the refueling of the device can take place.