My Thai House: Our garbage...uh...box?

We don't have garbage cans in our neighborhood. There is a method for putting the trash out, it's just not in a can, but rather, well, in a box-like-sorta-thing build into our gate wall. You open this box from the inside and put the trash bags in--cardboard is kept separate--and then someone comes, opens the box from the outside, and hauls off the trash. The cost of trash pickup is determined by the amount of trash we have. We have to buy these specially-marked bags and use them; they won't pick up any other bags.