Extreme Black delivers a very strong mint flavor with caffeine added! The Japanese public love the large size and triangular shape of these mints because they last a long time and are very effective at creating a fresh breath. FRISK is a world famous mint and this version comes in a sturdy black steel tin with a hinged door. There are 45 mints inside so they last a long time. Frisk is available in a few unique flavors every year. Uses Aspartame as a sugar substitute.