The device (1) has a filling element (6) filling a container (10) with fluid, and a transport device (2) for transporting the container along a predetermined transport path (T). A pressurization device (4) pressurizes the container with a flowing medium i.e. nitrogen. The pressurization device is arranged in such a manner that the flowing medium from the pressurization device strikes on an inner wall or a surface of a deflecting plate before the flowing medium reaches the fluid in the container. The pressurization device comprises a nozzle and a spray head. An independent claim is also included for a method for filling containers with fluids.