Keep bread, bagels, muffins, and other baked good fresh longer with this innovative adjustable bread keeper from Progressive International, which expands up to 11 inches to fit the size of your bread products. The bread keeper's air vents adjust to allow just the right amount of air into the storage area, and it comes with its own bread board for convenient slicing. Made of polyethylene /polystyrene /TPE , it's dishwasher safe. Adjustable vent regulates air flow. Durable polypropylene cutting board .