For in-store purchase only, at Walgreens, buy one Diet Coke 12-oz. Sleek Can and get a second can for free via this clippable coupon. (Search for "Diet Coke Sleek Can" to find it.) The coupon has a maximum value of $1.19, which is the price you'd pay per can in most local stores. You can mix and match flavors, which include Zesty Blood Orange, Ginger Lime, Feisty Cherry, and Twisted Mango. (Stock varies by location.) Deal ends April 30. Note: You must be a Balance Rewards member to use this coupon. (Not a member? It's free to join.) The coupon will be loaded to your account and can be redeemed by using your physical or mobile reward card at checkout