7-Eleven Slurpee
Register to join the slurpee rewards club and for 5 rewards points, you can get a free red box rental. Each size has a different point value, but one slurpee in a promo cup (the largest size) is worth 5 points.
There is a code on the cup that you enter online after joining/ logging in, and then you can select the redbox reward for 5 points. Redbox will send you an email with a code for a free rental and the code is good until June 30th.
borrowed from another great freebie site.