[DoubleFree]

Let's do a little calculation. For an upper bound, let's say you press your full weight onto it and the coffee grounds' resistance is not the limiting factor. That's maybe 90kg, times the acceleration of gravity, for about 900 newtons. That force is applied to a pi*(30mm)^2 or ~3^-3 m^2 area. That gives us a pressure of 900/3e-3 = 3e5 Pa or 3 bars.

[valarauko]

Hoffmann measured this with a pressure sensor modded aeropress - most typical brews would not exceed half a bar.

[klausa]

Getting over 1 bar gets you to a spray of coffee that sprays everywhere: https://youtu.be/Qz_GZpzpst4?t=500

[dmonitor]

why does he have it so far away from the cup?