The C&G 40 mL precleaned glass bottle is used to collect and store liquid samples. It is used while testing semi-volatiles, pesticides, PCB (printed circuit board), diesel range organics, TPH (total petroleum hydrocarbon) and metal sampling. It is mainly used in research laboratories or in chemical industries. This L1 glass bottle comes with a 24-414 white PTFE thin septa cap which ensures tight sealing of sample.