A distillation flask is a laboratory glassware used in the process of distillation, which separates mixtures based on differences in boiling points. Typically made of glass, it features a round bottom to allow even heating and a neck that connects to a condenser. This design helps in collecting the distilled liquid, known as the distillate, while leaving behind impurities or substances with higher boiling points. In a distillation setup, the distillation flask is often heated over a flame or a heating mantle. As the mixture inside heats up, the component with the lowest boiling point vaporizes first, travels through the neck, and condenses back into liquid form in the condenser. This process is essential in various applications, including the production of spirits, essential oils, and purified chemicals.