This is a knock box for espresso machines, to remove the coffee grinds from the basket. I've included a puck splitter in the design to help get the puck out quickly.

The knock bar needs to be printed with a fair amount of PLA so it's strong enough. But it's definitely strong enough. I used guerilla glue to join the two parts.

It's a good size, not too big, not too small, and allows for quick and easy coffee puck removal.

For all the coffee heads out there, this coffee knock box is missing from your setup.