Promotional Games & Toys, Color Changing Rubber Duck - Heat Activated, PVC rubber PVC Rubber duck changes color when water temperature reaches 38 degrees C /100 degrees F Duck starts a color and changes to white Note: Ducks are not weighted Note: Not designed for use as accurate measurement of temperature Product Size: 3.125" w x 3.75" h x 4" d Deco Eligible ... #RD270 $2.56/each.