There’s a new $1/1 Listerine Zero coupon available on Coupons.com! Take this coupon to Walgreens to get a bottle for only $0.99…
Listerine Zero (500ml), $2.99
Use the $1/1 coupon from here
Pay $1.99
Get back a $1 RR
Final cost: $0.99 each
Thanks, WildforWags!