Incense Coils are a type of incense made with coils and incense paste. They are often made with metal coils that are either soaked or lathered with the incense mixture and essence. Incense Coils have a flat base with several levels of coils. This can be anywhere from five to eight coils. These coils are a very popular variant of incense burning for longer periods of time (up to 24 hrs).