A closure for a container with a cap connecting to a neck of the container has at least one cutter edge placed around a central axis internal of the neck. First and second helical channels or grooves are defined in the outer surface of the cylindrical member between the scratching elements, the second helical channel or groove running in the counter direction to the first helical channel or groove. The uniform distribution of porosity within the metal may be provided by a way of a coated pore former including a homogenizing agent thereat to maintain a uniform distribution of pore former throughout a mixture of the coated pore former and a powdered metal. For each file migrated from the first storage device to the second storage device, a stub file is generated which includes information on the migrated file. The metal ion is used to template the threading of the guest molecule through the macrocycle host molecule by coordinating to a binding pocket formed from the binding unit of the macrocycle and the recognition moiety of the guest molecule. The clutch actuator is provided on an upper portion of the clutch cover.