Portable portable portable device

The Portable portable portable device (or called the Portuguese Gun by Jason Breshill) is a form of quantum tunneling device, used by Katie in Portugal. It is presumably developed by the Aperture Computer Assistance Center. There is a rule said by Gladys that states not to put the device in the water, even if the device is placed in the water, possibly due to the fact that it isn't waterproof, and in any event that it is submerged, could pose a health hazard for anyone who decides to touch it.