A microwave spectroscopy probe has a center conductor between a first ground plane and a second ground plane. The polishing pad includes a polishing layer having a polishing surface, a backing layer with an aperture and a first portion that is permeable to liquid, and a sealant that penetrates a second portion of the backing layer adjacent to and surrounding the aperture such that the second portion is substantially impermeable to liquid. The inlet of the die head is connected to an outlet of the extruder. In another form a storage buffer is coupled to the memory for receiving and storing data from the memory. A method is also provided for administering an active ingredient to a host by utilizing a composition of the invention.