We originally ran the post for a free Jamba Juice coupon back on May 4th as a Cinco De Mayo promotion. This is a reminder that you still have time to take advantage of this offer. Sign up to become a Jamba Juice insider and you will receive a printable Jamba Juice coupon for $1.00 off any juice purchase. As a Jamba Juice insider you will receive special insider news and exclusive offers. Enjoy the beginning of the summer weather with this awesome coupon before it expires June 1, 2015.