Abstract: A printed promotional coupon comprises a multiple-product base coupon and a plurality of product stamps. The product stamps bear indicia defining a coupon redemption value for a particular product purchase. The coupon acquires value and becomes effective only by the affixing of one or more stamps onto the base coupon, each at a location which bears indicia corresponding to the associated stamp. The coupon holder can determine the overall redemption value of the coupon by selecting the number of stamps affixed, corresponding to the number of different products purchased at any retail store carrying the products. In one embodiment, the base coupon and product stamp form a single sheet, with the product stamps being detachable from the base coupon. In another embodiment, the product stamps are on a card or sheet separate from but distributed with the base coupon.