A device for processing a biological sample includes a processing unit having at least one opening to receive a sample vessel and a plurality of processing stations positioned along the opening. The mill blank is substantially free of cracks and discontinuities. In its’ dry state the liner may set into a toilet bowl above the water level. To also assure the complete cutting through of fiber-containing or film-shaped feedstock, a counter knife is arranged in the cross wall opposite to the blade of the knife which is stationary relative to the cutting chamber and which during the cutting process forms a cutting gap with the blade of the knife. The converting module is electrically coupled to the electricity storage module and converts the electromagnetically induced current for facilitating a charging of the electricity storage module.