The invention relates to a device and method used for pressing at least one area of a packaging. The packaging is composed of a multilayer composite material at least in some areas. A pressing tool used for pressing comprises at least one contour element that can be inserted into an interior of the packaging and at least one pressing element that is arranged outside of the interior and opposite the contour element. The pressing element and the contour element are arranged so that the pressing element and the contour element can be positioned relative to each other. The pressing element has an elastic consistency and is provided with a flexible reinforcing device at least in the area of the extent of the pressing element facing the contour element.