To better understand the local pore environment, we develop a measure of the distribution of groups from the gyroid minimal surface. For a given group, we calculate the shortest distances from its heavy atoms to the gyroid minimal surface as shown in Fig 7 . We then bin these distances to generate a distribution function for the specified group. A distance of 0 nm corresponds to a group lying on the minimal surface. This distribution function is analogous to the density profiles of the bilayers used for tuning the CG model. In the case of the bilayer, the reference minimal surface is the xy plane, so all the distances calculated are simply the z coordinate for the center of mass. The minimal surface distribution functions reveal that the annular pore does not have a strict cutoff where head groups line a glycerol-filled region, but rather a fluctuating pore with a mixture of head groups, counterions, and solvent defining the pore region. The results of the minimal surface distribution function are shown in Fig 6 . The density profiles are shown for solvent molecules, head groups of monomers on either side of the minimal surface, monomer tails, and counterions (see SI Fig S8 for visualization of these groups). These results agree with previous work on different LLC monomers in the hexagonal phase showing that LLC pores do not have strictly defined pore wall cutoffs. The head groups of monomers on either side of the ideal minimal surface overlap and protrude into the solvent-filled pore. As a result, the head groups, solvent, and counterions are not distinctly separated but form a continuous, interconnected hydrophilic region. This hydrophilic region serves as the pore, and head groups have the flexibility to rearrange within the pore environment to accommodate nearby solutes.