Macy's offers the Martha Stewart Collection Salt Plate Tray for $11.93. Pad your order with a beauty item (they start at $3) to bag free shipping; otherwise, shipping adds $10.95. That's $18 off and the lowest price we could find. It's made of porcelain and is designed to protect and preserve salt plates, which can be used as cookware or serving pieces and add flavor while retaining temperature.