A distiller is a device used to separate components of a liquid mixture based on differences in their boiling points. This process, known as distillation, is commonly used to produce alcoholic beverages, such as whiskey and vodka, by concentrating the alcohol from fermented liquids. Distillers can vary in size and complexity, from small home setups to large industrial units. In addition to producing spirits, distillers are also used in the production of essential oils and in the purification of water. The process can involve multiple stages, including fermentation and condensation, to achieve the desired purity and concentration of the final product.