Go here to print a $1/2 packs of Trident Layer Gum. Walgreens is running Register Rewards this month on the Trident gum. So here is the breakdown on how to get 2 packs for free:
Buy two packs of Trident Layers 2/$2
Use $1/2 printable coupon
Pay $1 out of pocket and get a $1 register reward back
There's also a .75/1 pack coupon here.
Thanks, Common Sense with Money!