Free Propel water at Walmart (YMMV)

My friend gave me a heads up about a deal at Walmart for Propel.  She had some $1 off 2 coupons and found them to be 50 cents each at Walmart, thus free!  So if you're hoarding some $1 off 2 coupons, be sure to check the price at Walmart.  If the shelves are empty, have them scan the shelf tag to see if there's more in stock hiding in the back.