Walgreens: $5 RR for every $25 you spend

From Hip 2 Save:

"Also, thru 12/18, for every $25 you spend (before coupons), you'll score a $5 Register Reward. You can spend up to $100 in a single transaction (before coupons) and you'll earn a $20 Register Reward!! Check out the details on the front page of the weekly ad here. (Thanks, Cleverly Simple)"