Check your Walgreens flyer and see if your area is part of the Mail In Rebate offered by Coors/Miller.
Different areas have different offers. Our area is offered a $20 Mail in Rebate when you purchase 2 Miller or Coors 12-pks, Yellow Tail Wine and $20 of anything else.
Other areas are said to have a $10 Mail In Rebate when you purchase $15 of anything in the store (no alcohol purchase required).
You can check your local weekly ad here. What rebate, if any, was in your area?