System for handling containers having a movable carrier on which at least one handling station for handling the containers is arranged, wherein the handling station is transported along a predetermined transport path, and wherein the system has a clean room inside which the containers are handled, wherein this clean room is delimited relative to an unsterile environment by at least one wall. According to the invention at least one wall of the clean room is at least in sections inclined relative to a horizontal plane in such a way that a liquid can be led out of the clean room along this wall.