They are fine for those who has e automatic burr grinder

This has no filter inside and that makes the coffee powder stick together and gets cramped. Either you have to use a very coarse grind level for the water flow. But you get a very weak espresso. To get a good espresso you have to grind the coffee very well and all the pieces must be of the same size. If you buy your coffee alread grinded, that will work fine, but don’t fill it up to the max. The point of measurement is when you close it and shake it you can hear the coffee also shaking in there

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