I used to take coffee for granite.
But it was hard to earn a living, granite is so much heavier than coffee and everyone demanded even trades.
After a while, I started to spray paint small rocks so they looked like coffee but my deception was discovered and I was cast out from both the coffee and granite trading guilds.
It must be hard on grinders. I mean granite.
And unbelievably slow.
You can forget about a "morning" cup.