Porous liquids (PLs) are a relaVvely new sub-class of porous materials that combine the guest-accessible caviVes of porous solids with the fast mass transfer of liquids, yielding a liquid featuring permanent 'intrinsic' porosity. This unique funcVonality was iniVally proposed by James and colleagues, leading to the categorizaVon of PLs that was recently expanded into four types (Figure ): type I -neat molecular liquids featuring permanent, intrinsic porosity; type II -empty molecular hosts dissolved in cavity-excluded solvents; type III -mulVphase fluids featuring porous materials dispersed in cavity-excluded solvents; and later, type IV -neat, meltable extended porous solids. The recent experimental realisaVon of porous liquids has since moVvated a host of potenVal applicaVons to be invesVgated, including gas separaVon, gas storage, and catalysis, among others. Indeed, PLs have garnered acenVon as potenVal replacements for current industrial liquid sorbents, as they would be more easily implemented in exisVng industrial flow processes than their solid-state counterparts. Considering the diversity of potenVal applicaVons and the component space, PLs are an interesVng funcVonal materials design problem. To select the ideal PL for a target applicaVon, an understanding of the macroscopic properVes and the materials space that PLs span is required. Further, while each type offers intrinsic porosity, they differ in the ease of design, the required properVes of their consVtuent components, and the overall properVes of the resulVng PL. For example, type I PLs possess higher viscosiVes compared to type II and III PLs and require materials exhibiVng a low melVng point without risk of decomposiVon or loss of porosity. Comparing type II and III PLs, both require cavity-excluded solvents, but the former relies on highly soluble porous material-solvent combinaVons, and the lacer, being dispersions, require careful design to ensure stable dispersions are formed that do not suffer from phase separaVon (i.e., creaming or sedimentaVon). The design rules for selecVng a suitable solvent that both highly solubilizes the molecular host and is size-excluded are sVll unclear, and the move towards less toxic and lower cost solvents is also desirable for scale-up. Owing to these challenges, here we focus on the development of a workflow for type II PLs to streamline the idenVficaVon of size-excluded and highly solubilising solvents, although the developed methods here would also be extensible to type III PLs where size-exclusivity and a poor solubilizing solvent is required.