6 ml, 10 ml, 20 ml Headspace vials – crimp. celar or amber glass; crimp cap 20 mm; vials with flat or rounded bottoms (according to HeadSpace system) Different type of caps – aluminium with different hole diameter, magnetic, bimetal . 10 ml, 20 ml Headspace vials – screw. volume 10 and 20 ml; used with 18 mm screw cap – SS or magnetic