The invention relates to a container for drainage of fluids or wound secretion, comprising an inlet opening to connect with a drainage line and an outlet opening for releasing waste air accumulated inside the container during drainage, which is characterized in that the container is pre-evacuated, and the outlet opening is sealable, so that the container is transferable in a first and in a second operating condition, wherein in the first operating condition the outlet opening is sealed, so that a suction can be achieved at the inlet opening caused by the vacuum inside the container, and in the second operating condition the outlet opening is opened, so that air can enter the container through the outlet opening and neutralize the vacuum present inside the container.