Well I ordered a bunch of Omaha steaks and it came 2nd day with dry ice. Very well packaged. They are pretty cheaply priced steaks. Anyway back to the DIY part. The cooler used for shipping was very nice for a Styrofoam throwaway. It measures 19x16x16 (LxWxH) externel and 15x12x12 internal. The cooler is made of dense foam that is 2" thick all the way around. I used plexiglass (double paned for insulation) on the lid. There are two 11x11 heat tapes on the sides. At the bottom I placed a PCI slot card cooler (computer fan) for circulation. The benefit of this fan is that no baby can in any way get caught in the blades and they move plenty of air. I have a herpstat proportional that will be running it. Total cost $140. A little pricy for such a small bator but it was a fun project.