Boiling flasks have short necks and carefully controlled wall thicknesses to maintain proper balance between thermal expansion and mechanical strength for optimal shock resistance. These flasks are equipped with standard taper 14/20 outer joint, standard taper 19/22 joint, and standard taper 24/40 joint.

They are extremely chemically durable for contaminant-free results and long life under rigid lab conditions. Working temperature: 230 °C (446 °F).