Industrial Glassware - 40-ml EPA VOA Vials. 40-ml Vials with Solid-top Teflon-lined Caps. Manufactured from borosilicate glass, these vials provide excellent chemical-resistant storage. Adhesive-free 24-400 closed-top Teflon-lined cap. Available pre-cleaned or not pre-cleaned. Pre-cleaned vials are processed under strict quality-control conditions.