I used sound waves to make espresso. It could cut coffee‑brewing energy use by 75%
Stuff | 14.06.2026 19:50
Most of us think of espresso as a hot, high-pressure ritual. Finely ground coffee goes into a machine, boiling water is forced through it, and in about 30 seconds we get a concentrated shot with crema, aroma, bitterness, body and caffeine.
