The front is usually a white paper stock or BOPP material with permanent pressure-sensitive adhesive. The back is formed by laminating the front to a coupon base material. The front indicates the savings by purchasing the product NOW. Back would include a bar code and state the conditions such as expiration date. At the cash register the coupon is clearly removed from the base film—the film remains on the product or package. When removed the coupon is free of adhesive and can be placed in the register drawer without becoming stuck to something.