Tube glass vials, made from borosilicate glass of hydrolytic class 1, have an unsurpassed hydrolytic resistance in accordance with the international relevant ISO standards 719 and 720. Its outstandingly inert surface minimizes interactions between the container and the drug without further treatment. They are first-class containers for liquid or solid products. The low tolerances as well as the flat bottoms make tube glass bottles particularly suitable for lyophilization. The bottles are produced in vertical machines equipped with optoelectronic control systems. All functional dimensions are tested 100%.