Smoothie King: Buy One Get One FREE Lean1 Smoothie This post may contain affiliate links. Please read our disclosure policy here.August 29, 2011 by Cassie Leave a Comment Request a coupon for buy one get one FREE Lean1 Smoothie from Smoothie King by joining their eclub. You will be able to print your coupon immediately! Find a Smoothie King locations. See more Restaurant Deals and Coupons Send me my FREE Natural Cleaning RecipesIt's important to me as a mom to use cleaners in my home that are natural and a healthier alternative for my family. I bet it's important to you as well. Sign up to receive our 22 favorite natural cleaning recipes delivered right to your inbox. Send my eBook! Check your inbox for the next step! We hate SPAM and promise to keep your email address safe.