EXPIRED – Free Nature Valley Wafer Bars at Meijer July 26, 2019 by moneysavingduo Leave a Comment Have mPerks? You won’t want to miss this weekend’s freebie offer on Nature Valley Wafer Bars. If you have an mPerks account you can clip a manufacturer’s coupon for Nature Valley Wafer bars. The coupon is valid on all 5 ct. varieties. Don’t have mPerks? Download the app and start saving on groceries today!