A method for filling packages with changing products in a filling machine is disclosed. Packages are successively transported through a filling machine, and the packages are each successively filled with a first product in a sterile environment via a filling outlet connected to a product tank. To empty the product tank, at least one outlet means is brought into an emptying position, and a residue of the first product is discharged at least partially from the sterile environment, via the outlet means located in the emptying position. The outlet means is removed from the emptying position following the emptying of the product tank. Packages are subsequently each successively filled with a second product in a sterile environment, via a filling outlet connected to a product tank.