There are a couple new Listerine coupons available:
$1 off Listerine Total Care Plus Whitening Anticavity Mouthwash (500ml or larger)
$2 off the purchase of any Listerine Zero Mouthwash (500ml or larger)

You can use one of these coupons at CVS starting, 8/22, to score a sweet deal…
Buy Listerine Zero $3.99 = $2 ECB
Use $2/1 Listerine Zero coupon found here
Pay $1.99
Get back a $2Ecb
Final cost FREE!

(Thanks, Pirates of the Supermarket!)