A beverage container washing system may be used for rapid washing and/or sanitizing of beverage containers, e.g., for use in a retail environment to wash and/or sanitize customer-provided beverage containers prior to filling the beverage containers with purchased beverages, among other applications. The beverage container washing system may include multiple concentric housing members supported on a base, and a slip ring configured to supply power to one or more ultraviolet lights of an ultraviolet sanitizing assembly and disposed on a rotatable one of the concentric housing members.