This style of incense is known by names such as "incense pellets", "moist incense", and "kneaded incense" (or in Japanese "nerikoh"). This is possibly the oldest form of rolled incense. Unlike incense cones, incense pellets require an external heat source, such as charcoal. Gently heating one of these pellets will release an amazing, perfume scent. They never flame, they just gently smolder. As with all of the products I make, my Dragon Drops never contain synthetic ingredients or saltpeter. My Dragon Drops are aged for at least a year before offered for sale to ensure a smooth, blended scent.