How many times have you seen a trail of paint on the roadway from a spilt can of paint in the back of a painter’s truck? Were you ever tempted to follow the line to figure out where it ended up? I have! Could a non-permanent and non-toxic version of this be used to drive customers to your store? Sure!
The Contrail, is a small device that connects to any bike’s seat, and applies a thin layer of chalk to the rear wheel. As the bicycle travels down the road, the tire draws a faint line in street.
A larger device attached to a automobile, especially one that was able to dispense a variety of different colors of chalk, could be really interesting from a marketing point of view.