Grindenstein is a compact coffee knock box that bangs out your coffee grinds. Its super strong and sturdy, and even tucks away on the drip tray of your espresso machine for space-saving storage.
 
Key Features:
- Capacity/ Volume : 8 pucks of discarded coffee/ 400ml 
- Materials: ABS plastic
- Santoprene rubber coated steel bar
- Top rack dishwasher safe
- BPA safe