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This bathtub can alter its color with the change of water temperature. If the water is hot for bathing, the thermochomic materials in the tub turn red; If the water is cold, the thermochomic materials in the tub turn blue; If the water temperature is moderate, the tub glows yellow, which means that taking a dip will be comfortable now. Emotional Design through the use of colors with symbols can make life better, especially for children, who have delicate skin and need precious good care. In addition, this interesting bathtub can let the kids fall in love with a bath.