Comparisons between 3.0mm white corrugated cardboard and 5mm black neoprene in direct sunlight & in the shade, wrapped around a cold 375ml can, with a starting temp of 4 degrees Celsius.

We used three “BBQGO Digital Food Thermometers - Model:BG-HH2C” for these experiments. We do not assume the accuracy of these readings to be exact, but rather an indication of the thermal comparisons of corrugated cardboard and neoprene materials under the same conditions at the same time.