Choose from different brands, clear or amber, flat or round bottom, 5, 6, 9, 10, 12, 20 or 27ml sizes, SPME Vials or Vial and Cap Kits from the options below. Click HERE for Headspace Caps Ordering Page. Click HERE for a Storage Box for Headspace Vials. Click HERE for an Acrylic Rack for Headspace Vials.