This week, Mars Fun Size Halloween candy is on a buy one get one free promotion. You’ll need to clip a digital Mars manufacturer coupon to your Walgreens account. Take your pick of four of your favorite participating varieties and pay just $2.18 each. It’s as simple as that.

Keep in mind that in order to use the digital coupon, you need to buy four bags as you can’t apply a coupon towards a free item. You can read more about the Walgreens Coupon Policy.

Remember that big things are happening soon — Walgreens is saying goodbye to their Balance Rewards program and saying hello to myWalgreens. Now’s a great time to pay with your Points to get ready for the new program.

Buy 1 get 1 free through Oct. 31

Use one $1.25/2 MARS Wrigley Halloween Bags 8.42-21.5 oz, Walgreens L2C Coupon (exp. Oct. 31) (

Final Price: $2.18 each, when you buy 4