A device for sterilizing cuboid-shaped cardboard/plastic combipacks in an autoclave, wherein the packs consisting of product and packing are subjected to heat treatment at a certain temperature over a certain period of time, wherein the product consists of a liquid and chunky portions, and wherein mechanisms are provided inside the autoclave to drive the packs rotationally about a rotational spindle, and a cuboid-shaped cardboard/plastic combipack for use in such a device.A plurality of packs, are arranged closely adjacent to one another in parallel rows, to be arranged on support floors and for a plurality of support floors loaded with packs to be arranged one above the other and fixed in their mutual positions. The cardboard for the pack used therewith is made water-repellent by means of glue to reduce the intake of water.