Refresh your bad breath with Listerine Cool Mint Pocketpaks Breath Strips (Size variance). These mint breath strips dissolve instantly killing 99 percent of germs that cause bad breath. * Slip your pack into your purse or pocket so you can easily get fresh breath and kill bad breath germs after your morning coffee or before an important meeting or date. Each breath strip has a refreshing Cool Mint flavor to leave your mouth feeling clean and fresh. *In laboratory tests.