These Martha Stewart Collection Collector's Enameled Cast Iron 6qt Round Casseroles drop from $179 to $49.99 at Macys.com. Plus, shipping is free. These feature a stainless steel lid handle, heavy-duty construction, a 6qt size, durable details and is oven safe to 500ºF. Choose from 10 colors while supplies last. Sales tax is charged in most states.