The OCB Flavor Card is a great way to add a cool refreshing flavor and aroma to many products. You just take the flavor card out of the pack, put it into your favorite bag, jar, or pack with your dry materials, and in 1-3 hours you have the great flavor of menthol added to your product. It's a great way to fight the cold and flu season by just adding one of these cards to the bottom of your favorite box of tissues and in just a few hours your tissues will have the soothing relief of menthol.