A round-bottom flask is a type of laboratory glassware commonly used in chemistry. Its spherical shape allows for even heating and mixing of liquids, making it ideal for reactions that require consistent temperature control. The flask typically has a narrow neck, which helps to minimize evaporation and allows for easy attachment of other equipment, such as a condenser. These flasks are often made from borosilicate glass, which is resistant to thermal shock and chemical corrosion. They come in various sizes and are frequently used in conjunction with a heating mantle or Bunsen burner for experiments that involve heating substances.