As a final step, the maximum solubility of the four idenVfied PLs was determined and the CH4 uptakes at the respecVve maximum solubility was measured (Figure ). In previously published studies, the PLs were compared at the 200 mg + 1 mL formulaVon so the materials could be compared directly, without requiring density measurements. 9,10 Gas uptake enhancement was shown to improve with the cage concentraVon previously. Similarly, here we observe enhanced CH4 uptake for the PLs at their maximum solubility for all samples (Figure ). The chemical shib of the 1 H environments in the CH4 gas are shibed further downfield in the NMR spectra (Table ), showing the increase in cavity concentraVon further moves the equilibrium towards gas occupying the pores present. The gas uptake in the 2-ethylphenol based PL at the maximum cage concentraVon gives a CH4 uptake capacity of 60 µmol mL -1 . This exceeds the maximum uptake enhancement of the previously reported PL based on 2-hydroxyacetophenone (41 µmol mL -1 ) and reaches 74% of the uptake capacity of the PL based on perchloropropene, making this the highest performing nonchlorinated scrambled cage-based PL to date. It should be noted that in previous studies, addiVonal purificaVon of solvents was required to give the enhanced porosity recorded, here the high gas uptake and porosity was achieved using the as-purchased solvent. Again, the extent of porosity recorded in the PLs broadly correlates with the confidence at which size-exclusion was predicted, further validaVng the model. This also shows how experimentally, size-exclusion can be viewed as a conVnuous metric, with parVal occlusion of the pore occurring with parVally excluded solvents. While the model does not directly correlate with this, the KDE can reflect the level of porosity retained upon dissoluVon of the POC.