Empty Glass Vial, Sterile, 100mL Clear, 25/tray100 mL Sterile Glass Vials for Injection, Clear vials that are cGMP compliant used to mix liquids prior to injection. Empty Glass Vial is a clear, sterile glass injection unit that does not contain any water (pyrogen free). Each vial is sterilized with a dry heat process called depyrogenation. This process removes removal of pyrogens from solution, most commonly from injectable pharmaceuticals. Sold by the Tray of 25