Airwick freshmatic compact imotions kit ( price $7.99) will be B1G1 free in the week of 3/20-3/26 at Walgreens. Get the two kit free with $4/1 coupon coming in Smartsource 3/20.
Coupon Detail : Air Wick $4/1 any Freshmatic Starter Kit (5/1/11)
So buy two for $15.99, give two $4 coupon, register will take off $7.99 in the end.
Note : It's Official Walgreens Coupon Policy to allow two coupons on B1G1 deal.
"When items are featured in a Buy One, Get One Free promotion, up to two coupons can be used against the items being purchased, as long as the net price does not go below zero for the items being purchased."