A method. A cooling fluid flows through a flexible tube into each rack container including a plurality of rack units via a cooling conduit that encapsulates the flexible tube and is secured at a first port on a top surface of each rack container. The rack units are stacked in a direction parallel to a floor. The cooling conduit includes a first segment, a second segment, and a third segment. The first segment is linked to, perpendicular to, and in direct physical contact with, the second segment through a first articulation. The second segment is linked to, parallel to, and in direct physical contact with, the third segment through a second articulation. The first and second articulations are configured to rotate horizontally in a plane parallel to the floor to enable the flexible tube to maintain smooth contact with the top surface of each rack container.