Tupperware Ultra Pro Oval 3.7 Qt Oven & Microwave Safe Casserole Dish - BPA-Free Food Storage Container for Baking, Meal Prep & Leftovers

Best. Have smaller one from decades ago which I thought was special promotion and never to be found again. Roasts perfectly.had one similar for over 40 yrs......so hope this one lasts that longLove mine, but you can get it cheaper from an independent rep