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Have you ever been burned while drinking hot coffee? Watch Out is an inexpensive and eco-friendly coffee cup lid with a steam indicator that can detect hot steam and change its color from blue to pink. The hotter the coffee is, the pinker the indicator will turn. With Watch Out Lid, you can enjoy your hot coffee more with just a quick look of the color of your hot coffee. No more burn!
National Yunlin University of Science & Technology
Guo,Jian-Hong Hung,Shiuan-Chuen Chen,Yan-Xun