usualy there is a drop of box in some of the big grosery shops like in "AL MERA" in GARAFA,but i dont know if there is one in your area ,just ask the supermarket staff about it.
usualy there is a drop of box in some of the big grosery shops like in "AL MERA" in GARAFA,but i dont know if there is one in your area ,just ask the supermarket staff about it.