Ultrasonic espresso’ made with cold water and high-frequency sound waves uses less energy than the traditional version – and taste tests show it’s just as good.
Scientists Brewed Espresso at Room Temperature Using Ultrasound and Saved 75% of the Energy. The Coffee Tastes The Same
4 hours ago
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Ultrasonic espresso’ made with cold water and high-frequency sound waves uses less energy than the traditional version – and taste tests show it’s just as good. 
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