I'm new here. I am working on a fictional space commerce system using containers to transport things between planets. The container size is 4x4x8 meters and most often it would be colored but call it grey for the purpose of the question. I don't know what you would make it from, I suppose metal as I can't think what else would survive deep space. My question is this: The container starts off on an Earthlike planet at std. temp, then is transported into orbit, then loaded on a Space Container ship. How long would it take for the container to drop in temp to near 4K? I assume that before they got too cold the cargo ship would pass near a star and spin the ship to "rotissierie" the containers to warm them up - but that only makes the questions grow: I am sure that at some low temperature materials such as plastic and lubricant oils will break down - what would be a fair estimate of the safe minimum temp for such things? Any help greatly appreciated.