Combining inner and outer layer of Cyclic Olefin Polymer with center polyamide layer, Gx MultiShell Vials offer safety in filling, transportation, storage, and administration of biopharmaceuticals. Vials have high level of oxygen impermeability, making them suitable for packaging reaction-sensitive parenterals. Three-layer structure also maximizes break resistance, while low protein absorption minimizes product losses and eliminates need to overfill vials.