Glass Vials 5 Ml found in: Snap Cap Vials, Disposable Borosilicate Glass Scintillation Vials, Vial 5 ml, 10 ml Vacule With 22-350 Cap, Screw Thread Micro-V.. these vials are assembled with the following materials: Type 1 borosilicate glass, PTFE/silicone septa, and a polypropylene cap. PTFE/silicone septa, and a polypropylene cap.