Wheaton Glass Vial found in: Nextgen V Vials®, Glass with Solid Top Black Phenolic Caps, Large Opening Chromatography Vials, Glass Sampule® Vials, EC Vial.. Flint glass, with slight shoulder Tight fitting, lower-density polyethylene cap with thumb tab can be removed and applied easily with the same hand in which the jar is held. . Cases are constructed to store jars neatly, with caps