This ultrasonic espresso method uses 75 percent less energy and tastes just as good | The Optimist Daily

Their new method brews espresso using ultrasonic soundwaves instead of heat, at room temperature, in under three minutes.

Source: This ultrasonic espresso method uses 75 percent less energy and tastes just as good | The Optimist Daily

I’m assuming the coffee is still served hot, somehow. I did not have “new coffee brewing methods” on my bingo card.