Sign up to be a Jamba Juice Insider and receive a coupon for any 16-oz. smoothie for only $2 via Great Eats is live again! The last time we saw this deal was late June. Jamba Juice Smoothies are absolutely perfect on hot summer days, and they’re healthy too! Coupon must be printed and presented at time of sale. Tax not included. Offer not valid in Hawaii, Safeway, Vons or Pavilions Jamba Juice locations.