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I learned that different materials have different amounts of insulation. For example, a good insulator (the material that kept the water hotter)was the batting. The batting kept the water from 42.3 degree's Celsius.
The hot water started out hot, and the cold water cold. Over time, as the heat transfered, the hot water lost some of its heat to the cold water, and the hot water got cool, and the cool water got warm.