When defrosting, its safer to get it done quickly. That way theres less chance of bacteria building up - and this aluminium defrosting tray speeds up the process. The black defrosting side is inset with a lip which contains any liquid and saves mess on the worktop. The red polypropylene side can be used as a chopping board or to rest the roast after cooking. mysmartbuy 2-in-1 Defrosting Tray & Cutting Board - Aluminium Rapid Thawing Plate & Chopping Board with Hanging Handle - H1 x W24 x D40.3cm in Red