Flat Bottom & Conical Shell Vials | DWK Life Sciences. Home. Vials & Microplates. Shell Vials. Pharmaceutical, biotech, environmental applications. Routine HPLC, chromatography, dry storage, auto-sampling, dilution and titration applications requiring microliter to milliliter volumes. 51 expansion clear and amber borosilicate glass or polypropylene, vials are configured with and without caps.