Rebuildable Dripping Atomizers (RDAs) are used to drip or as of lately the most popular method Squonk your e-liquid directly onto the coil and wick to provide a more intense flavour from your eJuices and eLiquids. RDAs achieve this by having the coils very close to the airflow holes and a very short travel distance for the vapour produced to your mouth. They require high powered Mod devices to work and are suitable for more experienced vapers looking for the best flavour and vapour production.