Cooler Cat Doorway

Had an old cooler in the garage that was missing the little drain plug. Was going to print a new drain plug but decided to convert it into a little hideaway for our mouse eradicator since it's starting to get pretty cold out. Figure this should provide some nice insulation with the addition of some hay bedding. Doorway seems to be just the right size for him. It's about 5" wide and about 5" high.