FREE Coffee at Starbucks! This post may contain affiliate links. Please see the full disclosure policy here. Posted on September 29, 2009 Written by Mary Leave a Comment Starbucks will be having a VIA Ready Brew Taste Challenge in-stores on October 2-5. Those who participate in the Taste Challege will receive a coupon for a free Tall Brewed Coffee on their next visit!! This is a freebie I won’t miss!