Breville The Knock Box 10 Espresso Accessory, One Size, Brushed Stainless Steel The perfect match to your espresso machine. Conveniently store up to 10 espresso pucks, for quick and easy disposal. The Breville Knock Box 10 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 10 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 10 espresso pucks, for quick and easy disposal.