Space-saving cooking, maximum flexibility: with the ZWILLING UNLOCK All-in-One System. The pot set (16 cm & 20 cm) features flat glass lids and a detachable handle, combining sturdy stainless steel with a three-layer base for quick, even heat distribution. Click the handle on or off in seconds to stack your cookware and store it compactly. And with the separately available UNLOCK vacuum glass lids, your food stays fresh longer – perfect for compact kitchens and limitless cooking ideas!.