A conical flask , also known as an Erlenmeyer flask , is a type of laboratory flask with a flat bottom, a conical body, and a cylindrical neck, used for mixing, storing, and heating liquids. It is made with high quality 3.3 borosilicate glass, laboratory grade glassware. The high temperature resistant, acid and alkali resistant, with good stability. Export quality Conical perfect for any school, college & laboratory. Borosilicate Glass Conical Flask - 250ml, Erlenmeyer flask , also known as a conical flask , is a type of laboratory flask which features a flat bottom, a conical body, and a cylindrical neck. CONICAL FLASK definition: 1. a glass container with a flat base, a wide, rounded body, and a long neck, used in scientific…. Learn more.