Control over the conformational flexibility of p-sulfonatocalixarene in the solid state is possible in the presence of varied stoichiometric amounts of crown-6 and selected lanthanide(III) chlorides. Complexes 1 and 2 have the calixarene in the elusive ``up-up'' double cone conformation, whilst complex 3 has the calixarene in the centrosymmetric ``up-down'' double partial cone conformation, whereby it acts as a divergent receptor. Complex 1 has a double ``molecular capsule'' arrangement which is composed of two p-sulfonatocalixarenes shrouding two crown-6 molecules, also with both coordinated and homoleptic aquated lanthanide ions around the hydrophilic sultonate rims of the calixarenes. Complex 2 has a ``ferris wheel'' arrangement with one lanthanide metal centre coordinated to a sulfonate group and another coordinated to the crown ether whilst tethered to a sulfonate group of the calixarene. Complex 3 forms from a solution with large excess of crown-6, and possesses a crown ether molecule in each of the partial cones and has homoleptic aquated lanthanide ions involved in a complicated hydrogen-bonding regime within the extended structure.