Home-made, with two tupperware plastic boxes (one inside the other), a 91W peltier element, and two PC coolers. The interior is covered with two layers of thermal insulation: a 5mm sheet of polyestyrene foam, and adhesive thermal tape with aluminum foil (not shown in the picture). An electronic thermometer is included with a probe to measure internal temperature.
Cooler achieves 40°F (22°C) temperature drop in an hour.
