Abstract: A method of producing cellular, reticulated structures of elastomeric materials having interconnected networks of cavities which are useable in retaining and self-metering liquids. The method of producing such microporous polymeric structure includes forming a homogeneous mixture including at least one polymeric resin, combined with void former and a polyfunctional compound. The ratio by weight between the polymeric material and the polyfunctional compound is preferably from 18:1 to 1:3. The void former, polymeric material and polyfunctional compound are preferably admixed at approximately room temperature and then shaped at low temperature. The mixture is then cooled and the void former is extracted with a suitable solvent.