Abstract: An apparatus, system, and method are disclosed for attaching a container to a harness. The apparatus includes a harness having a mounting panel and at least one shoulder strap attached to the mounting panel. A substantially planar flange has a first end which is wider than a second end such that a first side and a second side of the flange taper as they approach the second end. A recess includes a pocket having an opening that receives the flange. The opening in the pocket is larger than the second end of the flange to facilitate receiving the flange within the pocket. The opening in the pocket and the first end of the flange are about the same size which restricts the lateral movement of the flange in the recess. First and second connecting member attach the mounting panel to the container.