Coordination cages, or metal-organic cages/polyhedra (MOCs/MOPs), are self-assembled container molecules formed through coordination bond interactions between metal ions/nodes and ligand donors, generally under thermodynamic control. We note that these terms are sometimes applied explicitly to architectures assembled from ligands with neutral (often pyridyl) donors (coordination cages) and anionic carboxylate donors (MOCs/MOPs). We do not make such a distinction here, but rather view these as different motifs that can be employed for related assemblies depending on the desired properties of the target cage.