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A comment on I used sound waves to make espresso. It could cut coffee‑brewing energy use by ¾. Parent comment

Re:I used sound waves to make espresso. It could cut coffee‑... by PoorlyNamed on Friday June 19, 2026 @09:41PM (#48605448)
By soaking regular ground coffee in water for 12 hours or so.
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Re:I used sound waves to make espresso. It could cut coffee‑... by tasercake on Friday June 19, 2026 @10:47PM (#48605869)
You may be thinking of cold brew, which is usually more expensive due to the higher coffee-to-water ratio. A standard ‘iced coffee’ at most coffee shops is espresso-based
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Re:I used sound waves to make espresso. It could cut coffee‑... by PoorlyNamed on Friday June 19, 2026 @11:26PM (#48606079)
Huh. I never drink cold coffee so I always assumed they were one and the same. Thanks for the correction.
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Re:I used sound waves to make espresso. It could cut coffee‑... by crazygringo on Saturday June 20, 2026 @11:07PM (#48615306)
This is not true.

A standard iced coffee is just regular brewed coffee that is then put in the fridge. (Which is different from cold brew which is brewed in the fridge.)

Absolutely not espresso-based.

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