The Breville Knock Box 20 is the perfect match for your espresso machine. Strike the portafilter against the knock bar for quick, easy and mess-free disposal of the coffee puck.. PREMIUM DESIGN: Incorporating our Luxe design, the new-look knock box will perfectly complement the Breville range of espresso machines.. EASY TO CLEAN & EMPTY: The Knock Box 20 incorporates a removable knock bar, allowing easy cleaning of the inner vessel.. EASY STORAGE: Compact design lets you neatly store on the drip tray when not in use.. LARGE PUCK CAPACITY: Conveniently store up to 20 espresso pucks, for quick and easy disposal.