Listerine Mouthwash $1.00/1 Coupon This post may contain affiliate links. Read the full disclosure. March 5, 2012 by Fritzie If you're new here, you may want to subscribe to my RSS feed. Thanks for visiting! Print a coupon for $1.00 off Listerine Mouthwash Antiseptic and various 1 Liter or larger. It expires 30 days from the print date.