Revolve On Demand Single Distillation Unit is made from 3.3 expanded borosilicate glass, an excellent choice for laboratory users who want to save on electricity and cold water while still getting just the right quality and quantity of distilled water. The two-stage distiller provides automatic operation to obtain pure water through distillation, which can remove various impurities. Raw water boils to produce steam, and this steam is sent to the condenser, where it turns into liquid state without impurities.