Thermo Scientific I-Chem® S226-0040 Clear Glass 40mL Processed Precleaned VOA Vials with Caps and Unbonded Septa. These Clear borosilicate vials are designed for water sample collection for volatile organic analysis (VOA). Vial shoulder slope optimized to prevent air bubble entrapment. Open-top white polypropylene cap with standard 0.125in. thick PTFE lined silicone septum is attached