There is a huge amount of garden grills on the market. Cheap ones for a few Euros and hightech machines for several thousand. The cheaper grills tend to be cheap in both, form and function whereas the expensive grills often seem to be just a status symbol.
The bbqbox is slim, functional and contained. It seems to appear only when it is needed.
You´re ready to start in no time and when the party is over grill, charcoal and equipment disappear in a minute.
The box is made of stainless steel but of course other materials are possible too.