De Blangy Paris has come to answer all our 90s, mood-ring dreams with their new nail polish technology, coming out next year!
Yep, this nail polish changes colour with temperature! You can change the colour easily by putting the nails in cold water or hot water, and then the colour will set.
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You can switch between the bright colour or a nude, more subtle shade with each application of hot or cold water.
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While there isn't too much information available yet - such as the product name and release date, we do know that it will be coming out in 2017, and there will be many colour options to choose from.
Bring it on!