You can get a voucher to get a buy 1 get 1 free deal for Starbucks Refreshers™ Beverage. Just go to
https://local.amazon.com/national/B00F53GMNQ to claim this free voucher. You'll need to get this voucher by 11:59pm September 15. Then take the voucher to get 2 Refreshers beverages for the price of One!! They come in flavors such as Cool Lime, Very Berry Hibiscus, and Valencia Orange.