Cover the outside with insulation. I use foil backed insulation board but polystyrene even a few layers of paper will help.
Literally just a cheap plastic tub. Can be £2. It's only temp as they grow quick when they're warm and eating.
Jack Torrance: Mr. Grady. You were the caretaker here. I recognize ya. I saw your picture in the newspapers. You, uh, chopped your wife and daughters up into little bits. And then you blew your brains out.
Grady: That's strange, sir. I don't have any recollection of that at all.