I am not a big fan of purple teeth. But it's a hazard of the business. So rather than wander the streets looking like someone badly in need of a dental hygenist, I wander the streets with a kid-sized toothbrush and a little tube of toothpaste. Sure, SpongeBob Squarepants and Lightening McQueen may not be the height of toothbrush chic (unless you're under five,) but they fit in a zip lock bag and tuck away in my purse. SpongeBob trumps purple teeth any day.