A review from Dr Scott Dalgarno's group has been published as a Hot Article in a special themed issue of CrystEngComm focusing on Structural Macrocyclic Supramolecular Chemistry. The review describes the evolution of strategies used in the assembly of metal-organic calixarene capsules, with a particular focus on p-carboxylato-calix[4]arenes (Piotr Cholewa's work).