Type I borosilicate Glass Sample Vials assures the contents integrity. Choose clear glass for maximum visibility or, for UV protection, cobalt blue, green or amber glass sample vials. A wide selection of caps is available attached or purchased separately. Choose from our standard screw thread glass sample vials or the wider mouth short compound vials. For cost-effective pre-cleaned sample vials, see our selection of vacuum and ionized vial kits. Other pre-cleaned glass samples vials, including vials cleaned for VOA (volatile organic analysis), are available by contacting our customer service department.