40 Ml Glass Vials at EPA storage vials for water analysis Scientific. 40 Ml Glass Vials found in40 mL Sample Vial In Lab File, Clr, No Cap, Screw neck vials (EPA), N 24, 40 mL Septa Vials, Wide Opening Crimp Top Vials,.. these vials are asseled with the following materialsType 1 borosilie glass, PTFE/silicone septa, and a polypropylene cap.