DURAN® laboratory bottles. Due to the properties of 3.3 borosilicate glass, they are suitable for use with a wide variety of chemicals and culture media. Available in sizes ranging from 10 ml to 25 l, in either clear or amber glass, and with caps made of PP (up to 140°C in blue), PBT (up to 180°C in red), or without a cap. Application examples: storage, sample preparation, and transport.