A device for filling a container with a filling product includes a filling valve for influencing the supply of the filling product into the container to be filled, generally during the transport, by means of a container transporting device, of the containers to be filled, a dosing valve for dosing a dosing product from a dosing product reservoir into the filling valve, and a main component reservoir for providing a main component at the filling valve. A dosing product changing device is provided for changing the dosing product in the dosing product reservoir during the filling operation.