cheap economical 10mL chemical oxygen demand vials with screw caps Autosampler Vials | SECO Deactivated Vial, 2 ml, Amber, Borosilicate Glass, 12 dia x 32 mm H, Screw Thread Finish, 8-425 mm Cap Size, 1.8 ml Maximum Fill Volume, Standard Opening, Flat Bottom, Write-on Patch with Graduations at 0.5, 1 and 1.5 ml, Silanized