Abstract: A solid-production system for producing a solid on demand is disclosed herein. In some aspects, the solid-production system includes a cooling block arranged to interact with one or more fluid molds to reduce a first temperature of a fluid dispensed in each of the one or more fluid molds to a second temperature, the second temperature being lower than the first temperature, to solidify the fluid in each of the one or more fluid molds; wherein the cooling block has a thermal mass operable to absorb and store thermal energy transferred by the fluid in each of the one or more fluid molds so as to reduce the first temperature of the fluid to the second temperature.