A trash bin having parts optimized for partial or full automated assembly. Components are fabricated of materials that are easily manipulated by factory automation equipment as well as those that may be selectively deformed during the assembly or installation process. Elastic or deformable characteristics also facilitate the retention of assembled or installed parts. A barbed element deforms during installation into a received aperture, then returns to a relaxed state in which one or more barbs inhibit the dislocation of the element from the aperture. A post having an aperture for receiving an axle therein is formed of resilient materials such that the post flexes outward under the urging of the axle until the axle is aligned with the aperture, at which point the post resumes a neutral position with the axle engaged in the aperture. Interfaces between components are selected in order to simplify the mechanical mating of components.