A box or container, formed from a single blank, with a group of protruding tabs and corresponding bottom apertures which act together to urge, and maintain, the alignment of an upper box on top of a lower box during the stacking of similar boxes. The cryptographic modules are capable of implementing the USPS Information Based Indicia Program Postal Security Device Performance Criteria and other required VBI standards. At least one valve provides fluid from the second source at a second pressure to supplement fluid provided to the head chamber from the first pump when the second pressure is greater than the first pressure.