The spray can is considered as the emblematic symbol of street art, as much by connoisseurs as by the artists/writers of this movement, even if other techniques are used like the stencil or collage. In reference to the standard contents of a spray can, 400 ml, the organizers of this event limited the collection to the first 400 participants who customized a spray can. This book presents this unique collection of 400 original works by artists from all over the world each respecting the same specifications: customization of an empty 400ml spray can.