STUDENTS have invented a colourful way for clubbers to check if their drinks have been spiked.

Under the name Undercover Colors, the North Carolina State University entrepreneurs have developed a nail varnish that changes colour when it comes into contact with date-rape drugs.

The idea is that the wearer can stir their drink, and the colour-change will alert them to the presence of drugs like Rohypnol and GHB.

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