Dreamfarm DFGR1280 Grindenstein-Coffee Grind Knock Box and Espresso Dump Bin (Red), 4.3" x 4" 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 Grindenstein' s patented shock-absorbing design and solid steel core make it truly impossible to break Grindenstein's unique height reduces clutter on the kitchen bench top and fits easily in the top rack of the dishwasher Every Grindenstein comes with an information booklet filled with great ideas on how to recycle the collected coffee grinds as a fantastic natural fertilizer for the garden BPA-Free