Double up on your favorite smoothies from Jamba Juice! Today only, Jamba Rewards members can buy any smoothie and get another for 50% off, no coupon or promo code required! Not a member yet? No problem! It’s fast, easy, and free to sign up. You’ll get access to lots of exclusive offers like this one, including 50% off any smoothie as a thank-you for joining! Visit the Jamba Juice website or download the app ( iOS | Android ) to get started.