We find them everywhere: in newspaper kiosk, in the store around the corner, pharmacies, tobacconists, bookshops, in any place where someone buys something. Large, small, round or square, with print or product sample, cash trays have become the most common communication tools at the point of sale in the traditional trade. The low cost and versatility they show, have turned them into an ideal communication tool for manufacturers of consumer goods. They can be customized with a label or sticker. Some models even allow you to insert a sample of the product promoted.