Listerine® Flavours Fresh Lime and Mint 500ml. Listerine fresh lime & mint mouthwash reduces the number of bacteria throughout the mouth and maintains good oral health. It's germs kill formula remove up to 97% of the bacteria which may lead to various oral problems like bad breath, bleeding gums and plaque. It reduces plaque by up to 56% more than brushing alone and provides 24 hour protection against plaque and lasting fresh breath confidence.