Glass vials are normally used for storage of biological material, human and animal cell at temperature as low as-190C. These sterile tubes are provided with white, prominent graduations and a long marking area for sample identification. The cap of these vials is provided with seal ring inside to make it completely leak proof. The longitudinal grooves in the base give a non -twisting feature to these vials. These are available in 2ml, 5ml, 10 ml with plastic caps, rubber teat etc.