The Progressive 6 Piece Baker's Storage Set combines high quality construction with a silicone seal for air-tight storage. This set include one of each Flour, Granulated Sugar, Brown Sugar, Powdered Sugar Keepers and 2 Mini Pro Keepers. All the keepers have patent pending stainless steel hinges that swing wide open for no-fuss access to fill or measure, and an easy-catch latch that holds the lid tightly closed. Dishwasher safe.