how in the world am i going to produce 1500psi? Let alone inside a case. Anything short of a controlled explosion will not produce that much presure. maybe the presure from a small nuclear reaction within my case. i could store the resultant gas in a titanium case slowly letting out 1500psi as i needed it over the course of the next 10 years! i just need to top up on plutonium and uranium every 10 years or so and im set.

SAFTY might be a small factor to contend with as a leak would most likely lead to the the destruction of Calgary and my untimely demise. Still a small price to pay for a the ultimate cooler.:shrug:
OK seriously though, is there a way to store liquid nitrogen until ready to use? maybe a valve controlled by a thermostat to reintroduce more into the system as needed?