Strike the portafilter against the knock bar for quick, easy and mess-free disposal of the coffee puck. The sturdy, die-cast...See moreStrike the portafilter against the knock bar for quick, easy and mess-free disposal of the coffee puck. The sturdy, die-cast metal canister with anti-slip rubber grip contains a durable, large capacity bowl that collects coffee grounds. The bowl is removable and dishwasher safe for added convenience. See less