Participating Walgreen's retail locations offer the Listerine Antiseptic Mouthwash 1-Liter Bottle in five flavors (Original pictured) for $3.99. This $1 offprintable coupon knocks it to $2.99. That's tied with our November shipped mention and the lowest total price we could find for this 33.8-oz. bottle by $2. Sales tax is added where applicable.