Abstract: Devices and methods using ultra-violet C (UV-C) radiation and/or its by-product to sanitize and/or deodorize. In use, a device's housing may be placed over the opening of a vessel. The housing may be held in place by a clip(s) that attach(es) to the periphery of the opening. A UV-C radiation source may extend from the bottom of housing into the interior of the vessel. The source may be selectably activated in one or more modes such as a selected time. Upon activation, UV-C radiation and its by-product begin to fill the vessel's interior. Because the opening of the vessel is substantially covered, the radiation and its by-product cannot easily escape. After a time, the radiation and its by-product fill the interior and begin to permeate the interior walls of the vessel, thereby sanitizing and deodorizing the interior and some of the interior walls of the vessel.