Instant Redeemable Coupons or on pack coupons are an excellent way to attract attention to your product on the shelf at the point of sale.  They are printed on the face and back where the adhesive is deadened and remove from your product cleanly leaving only behind a clear material that is not noticeable.  It is a proven fact that IRC's (Instant Redeemable Coupons) are the most used coupon in the marketplace as they are on the package, at the store and looking you in the face!