Get 20 FREE Stars for Starbucks Rewards Members! Collect stars to earn free drinks, free food, free refills and more. Having 5 stars will get you FREE Iced coffee and tea refills and a FREE item on your birthday. Just sign in and use codes:MCATALINH, MCATALINM, MCATALINK, and MCATALINL Limit 2 codes per day.
Note: It took me a couple tries entering the codes to get them to work but they both ended up working after a few tries. Also it takes a while for the points to update in your account.