The Pyrex® Shaker Flask with Extra-Deep Baffles from Corning are designed with delong style necks and three extra-deep baffles which can enhance gas transmission when used with rotating or reciprocating shakers. The long neck can reduce splashing and is specially designed for two-position polypropylene closures. Flask capacity 50mL, 2,000mL, and 4,000mL are available.