Abstract: Plastic shopping bags having upper and lower seams, at least one side gusset, an open bag mouth and upper bag handles has attached promotional ad strips. The strips include a central removable portion and a pair of remainder portions at either end of the strip that are sealed into the upper and lower seams. The ad strips are registered to the upper and lower bag seams so that whole numbers of the coupons, messages or promotions will fall within the removable portion of the strip. Perforations join the removable portion of the strip to the remainder portions. An apparatus for registering the ad strips to plastic shopping bags includes markers on the bags and on the ad strips, sensors to detect the markers, a controller to match the speed of the ad strips to that of the bag blanks, a sealer, bag cutter and either a stacker or a winder.