An Erlenmeyer flask is a type of laboratory glassware used for mixing, heating, and storing liquids. It has a conical shape with a flat bottom, a wide base, and a narrow neck, which helps prevent spills and allows for easy swirling of contents. The design makes it ideal for titrations and other chemical experiments. Typically made of glass or plastic, Erlenmeyer flasks come in various sizes, often marked with measurement lines for accuracy. They are commonly used in chemistry and biology labs, making them essential tools for scientists and students alike.