Sure, McDonald's may have Ronald McDonald and Geico has that gecko. But can they really compete with an enormous urine cup on legs called Petey P. Cup? Or Mr. Testicles, a giant set of, well, testicles (or at least someone walking around in a plush costume approximating said body part)?
They range from the friendly to the ribald, but a number of health organizations employ mascots to grab attention, educate and entertain.