It is described herein an improved cryogenic storage unit. The improved cryogenic storage unit may include an apparatus for thermal regulation in a cryogenic freezer. The improved cryogenic storage unit may also include a cable gland. The improved cryogenic storage unit may also include a bearing assembly. The improved cryogenic storage unit may also include a system for charging a cryogen to a cryogenic freezer. The improved cryogenic storage unit may also include a venting system. The improved cryogenic storage unit may also include an alignment of a lid and a handle.