In nature, some animals like frogs and fish use bright colors to warn other animals that eating them could cause great harm... Soon coffee cup lids could give you a similar bright colored warning that your coffee is in fact scalding hot. (Reminds me of my old Hypercolor T-Shirts.)
Australian company, Smart Lid Systems provides a coffee lid that changes color from a dark brown to bright red when the temperature of the liquids inside is above 115°F. This color changing alert is meant to protect more people from being badly burned by hot liquids. The design of the lid also alerts consumers to improper fitted lids. As drinks cool, the color of the lid changes back to it's original dark form.
Color Changing Lid Demo
Have You Seen Any Other Color Changing Products? Let Us Know.