Abstract: A storage unit or bag with a lockable closure mechanism is provided. The storage unit includes a container formed with an opening to provide access thereinto, and a cover sized for selective placement and covering over the opening of the container in order to prevent access. A mechanism such as a zipper system is provided for selectively closing the cover over the opening of the container. The zipper mechanism includes a first locking member, and the bag itself has a second locking member attached thereto by a fabric, string or other element. The two locking members are designed to interlock with one another in order to prevent the zipper system from operating. Accordingly, in order to gain access into the bag, it is necessary to cut the fabric or string extending from the second locking member.