A packaging and disposal system for sealing waste and related materials within flexible plastic tubing for odorless and sanitary disposal. Improvements in the latch, including the addition of a transverse mounted latch spring, and improvements in the support retention springs serve to increase the ability of the device to operate efficiently and effectively and reduce the potential of accidental spills or other exposure of the waste package. The latch requires two independent motions to actuate and incorporates a transversely mounted latch spring. The reduced cross-sectional area of the retention spring design concentrates force applied to the package to increase the effective holding ability of the system.