Borosilicate Glass VOC Vials, DWK Life Sciences | VWR. These autosampler vials with open top caps are ideal for the analysis of volatile organic compounds.Water sampling vials are ideal for water sample collection and storage when testing for pollutants. To meet EPA standards and prevent contamination, vials are prepared in a solvent-free facility. Vials | VWR. VWR® Cryogenic Vials, Internally or Externally Threaded. Supplier: VWR International.