Analytical Vials – Sigma-Aldrich. We offer a wide selection of autosampler and general-purpose vials, including septa, caps, accessories, amber and clear bottles, headspace vials, Gc Vials at Thomas Scientific. of a screw cap vial with the integrity of a crimp vial, I-D™ vials have write-on patches graduated at 0.5, 1.0 and 1.5 ml. Also