Right now new and existing members to TopCashBack can score a FREE bottle of Listerine Mouthwash! Visit Kmart through TopCashback, purchase a bottle of Listerine Mouthwash - priced at $5.79. Choose a 1 qt 1.8 fl oz bottle of Listerine Zero (in clean mint) or Antiseptic (in original, soft mint or cool mint).  Choose in-store [...]