For a limited time, you can get a FREE bottle of Purex Liquid Laundry Detergent from Walgreens after cash back! To score this deal, just purchase one Purex Liquid Laundry Detergent from Walgreens in any variety for $1.99 (regularly $7), then submit the $2 cash back offer from Checkout 51, making your final price FREE! This deal is valid online and in-stores.