For everyone who makes espresso coffee at home the Joie knock box solves the extremely messy problem of removing the used grinds from your espresso machine's portafilter or group handle. Forget trying to wash oily grinds down the sink or having to put your hand inside a filthy garbage can.just turn your portafilter upside down over your Avanti knock box, tap tap, and you're done.you have an empty portafilter. The Joie knock box has a patented unbreakable design and its compact height allows you to store it on your espresso machine's drip tray when not in use so it doesn't take up precious counter space. Easily cleaned in the top rack of the dishwasher. Confirmation of your claim can be done by email. To return any item for any reason, the customer must arrange for return regular postage by Australia Post. Please obtain tracking details and advise of the tracking information as soon as your damaged item is sent back to us. Change of Mind Our change of mind or incorrect choice policy lasts 30 days. To be eligible for a return for change of mind or incorrect choice, your item must be unused and in the same condition that you received it.