Mouthwash

Alcohol-free, cinnamon, a 2 oz bottle that clears airport security and fits a wash bag. The cinnamon flavor leaves a mild aftertaste. It is a travel-size bottle, so it goes in a toiletry kit without bulging. The 2 oz size is the only size, so there is no gallon jug to leave behind. It fits a purse pocket or a glove box.