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Posted on the Spanish speaking site, Verdematcha, the recipe is surprisingly simple and doesn’t require any type of crazy science.
The glowing effect comes from the tonic water thanks to quinine in the drink - an ingredient that;s made from a tree bark that gives tonic its bitter taste and the also has the ability to become fluorescent.
The website is in Spanish but the Google translated version describes the recipe without any lost moments.
They’re really simple to make and great fun at parties.