Caffeine sensor kit in the making?
Is the supposed "decaf" from your regular coffee joint keeping you up at night? Or is the expresso double shot not giving you the caffeine hit you hoped for?
One day, you might be able to find out why simply by shining a light into your cup.
Researchers from the National University of Singapore (NUS) have developed a fluorescent compound that will change colour to reveal the amount of caffeine in your drink. Shining a laser pointer into a drink sample will show you red-orange for high levels, yellow for medium and green for low.
This quirky bit of science could prove useful for those with caffeine allergies, or those trying to avoid the stimulant for health reasons, said lead researcher Chang Young-Tae.