An apparatus and method for fastening a container and a closure in a closed configuration is disclosed. The apparatus includes an insertion portion configured for insertion through an aperture of the container and an aperture of the closure when the container and the closure are in the closed configuration; and a restraining portion configured to prevent passage of the restraining portion through the apertures. The insertion portion includes a hanging slot, and a mechanism configured to impede removal of the insertion portion from the apertures once the insertion portion has been inserted through the aperture such that the container and the closure are fastened between the mechanism and the restraining portion.