It's hard to drive anywhere in the city right now without seeing an irreverent bumper sticker. Here's how the trend went beyond 'Coexist' and into overdrive.

Just remove the hat when you want to pour in your drink and... wait, where did Perry go? The ceramic mug is handmade, so it ...

But occasionally, a little bit of color emerges on the back of the car in front of you—a bumper sticker can turn a dull commute into a moment of joy or give you something to think about for the ...