Hear that? That’s the sound of an ultrasonic cold brew coffee ready in under three minutes ~ UNSW Sydney engineers have utilised sound waves to cut the time it takes to make a cold brew coffee from many hours down to mere minutes.

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[–] • 2 pts

Great, yet another coffee maker to add to my collection.

[+] [deleted] • 1 pt

[–] • 1 pt

Cold brew a light roast and you'll be able to synathetically see those ultrasonic sound waves in action.