The "La Caja China" is a box designed to barbecue a whole pig, yet it will cook any other type of meat as well.
The pig (or other meat) is placed inside the box, the lid is attached, and charcoal is placed on top of the lid to roast the meat inside. The grease flows into a catch pan. It's simple, but very effective.
Using this method, you can roast a pig in less than 4 hours. It's very popular for family reunions, tailgating, graduations, Luau's and anytime you want to feed a lot of people. It is very simple to use and is priced affordable for all budgets