Like a silicone ring so that I don’t have to worry about losing my nice one (despite the fact that Chris carried it most of the way on our last trip) (I’m going to wear the purple one to match my bike!):

Like stickers on half-gallon water bottles to distinguish the owner:

Like a bright pink note on an exciting package from Maine Bike Works:

Like a rainy day bike ride in a city that we are surprised to find that we are going to miss, mostly because of the people in it: