The road can be an angry place. Make it a little more positive with Motormood, the least ambiguous way thank other motorists. Motormood is made up of a “face” that attaches to the rear window with adhesive clips and a wireless remote that slips onto your sun visor. Click the button and the face lights up for six seconds before shutting off by itself. Get it in two colors — blue or pink — each including a red overlay for specific jurisdictions that require all rear facing lights to be red.

Find it at Amazon – $25