Bonjela Cool Mint Gel is a soothing gel that provides relief from the pain of canker sores, ulcers, cold sores, and other mouth irritations. This gel is perfect for use during the day or at night. The minty flavor leaves your mouth feeling fresh and cool. Bonjela Cool Mint Gel is a refreshing gel that provides relief from the pain of canker sores, ulcers, cold sores, and other mouth irritations. This gel is perfect for use during the day or at night. The minty flavor leaves your mouth feeling fresh and cool.