Makes sample handling and testing much easier because it gives the users the ability to perform important laboratory functions with both hands. No rack or other holder is needed to keep the bag upright. White write-on strip makes sample identification easier and more convenient. Capacity is measured in fluid ounces when the bag is closed and tab is folded over three times. Should not be used at temps. above 180°F. Can be frozen to any temperature, even liquid nitrogen. All bags are sterilized after manufacturing.