6. Orientation matters
While most organizations test their dry shippers before using them, the tests tend to be in an upright position with little or no movement. In transit the dewar can assume many different orientations ranging from upright to upside down and everything in between. This has a major impact on static hold time. A dry shipper on its side can lose as much as 60% of its hold time in a few hours. A large dry shipper transported upside down for even a few hours can go from days of hold time to hours.