Source: http://lifehacker.com/5975442/diy-altoids-make-curiously-strong-mints-in-unique-flavor-combinations
If you don't just buy Altoids for the tin you may want to consider making your own to experiment with flavors we'll probably never see in a mass produced product. If you already have flavoring or essentials oils and food coloring on hand the only specialty ingredient you need is gum paste, which is found in the cake decorating section of hobby shops or you can purchase it online for less than ten bucks.
Household DIY weblog One Good Thing By Jillee shares a simple recipe for curiously strong mints. Remove a piece of gum paste the size of an egg and knead it with your hand for a minute or two until it becomes pliable and then add any flavoring and/or food coloring you'd like (see the source link below for combinations and ideas) such as wild orange, raspberry, or pineapple. Continue kneading until the additions have been worked into the gum paste and then roll out the paste on a work surface covered in powdered sugar. You'll want it to be around one-eighth of an inch thick. To cut out the mints use a drinking straw to cut out little circles, toss the mints with a bit more powdered sugar to keep them from sticking together, and let them dry for 48 hours before putting them into a tin or other container.
I don't know about you but I'm now thinking about all kinds of crazy mint flavoring ideas such as root beer, wasabi, and mango.
Make Your Own "Curiously Strong Mints" | One Good Thing By Jillee