Innokin Slipstream Tank Atomizer features a push and twist top cap, top-fill mechanism. The SlipStream RDA has three colors available. It is made of stainless steel and pyrex glass and features 2ml liquid capacity.Three adjustable airflow ports can be found on the top cap. Turning the airflow adjuster will change the draw from tight (cigarette style) to open. With most e liquids, a tight draw intensifies the flavor – an open draw produces bigger clouds.