How do you make a smother box?

To make a smother box, start by selecting a sturdy, insulated container, such as a cooler or a cardboard box lined with a plastic bag. Next, fill the bottom with a layer of hot coals or stones. Add a layer of food, such as meat and vegetables, on top, then cover it with a damp cloth or leaves to retain moisture. Finally, seal the container and let it sit for several hours to slow-cook the food using steam and heat.