While doing some under hood dress up (aluminum coolant overflow tank, aluminum power steering fluid reservoir, aluminum brake fluid reservoir cover, aluminum fuse panel cover), I noticed that my windshield washer filler tube stood out like a "sore thumb." After some thought, I decided to try using 2" heat-shrink tubing to cover it. Easy on, and quick fit with a heat gun. If anyone tries this at home, be careful to not keep the heat on too long, or heating up adjacent wiring. Covering the adjacent area with foil is a suggestion. I also have a plenum extension cover on order.