1. A cathode cup comprising: at least one pocket; at least one filament associated with the at least one pocket, wherein a same number of pockets as filaments are present, with each pocket being associated with exactly one filament and having a length that is tailored to a length of the filament, and a singular hole having irregular rectangular proportions, wherein the at least one pocket and the at least one filament are positioned within the singular hole, wherein the cathode cup does not comprise a tab.