The Gridenstein is yet another ingenious design from the Dreamfarm team who have a knack for providing the perfect solution to everyday kitchen dilemmas, in this case - how to deal with the coffee grinds after making your espresso. Grindenstein is a super-sturdy knock box, specially designed for banging out your coffee grids and then storing them on the drip tray of an espresso machine until you are ready to dispose of them. A thick and durable rubber sleeve protects the group handle, absorbing the striking force and making it quiet to use. Grindenstein's patented shock-absorbing design and solid steel core make it truly impossible to break while its compact shape allows for space-saving storage in the kitchen and fits easily in the top rack of the dishwasher.