Constructed of borosilicate glass. Narrow Neck Erlenmeyer Flasks are conical and graduated.

Their characteristic shape allows efficient and spill-proof mixing of substances inside the flask. These flasks are ideal for titration as they support filter funnels and can be placed under a burette. Multiple functions like heating, cooling or storing substances can be done smoothly using a conical flask. Due to their minimum solvent loss properties, these flasks are also used for boiling liquids and for recrystallization.