The idea of using technology to make a better cocktail is hardly new — companies as big as Google on down to the smallest startups are trying to enable those of us with no mixing skills to make a passible Martini or Manhattan. The latest is the MixStik, an LED-covered stick you connect to your phone with Bluetooth. Once the MixStik is paired with your phone, you simply pick a cocktail recipe with the corresponding app — the stick then lights up with colors that correspond with your selected drink’s ingredients. Just drop the stick into the glass, fill it up according to the directions,and you should theoretically have your desired cocktail mixed to the correct proportions.
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https://www.engadget.com/2015/08/20/mixstik-led-bluestick-cocktail-tool/