The Eleaf Melo 2 tank features a large liquid capacity of 4.5ml. The Eleaf Melo 2 is remarkably easy to use due to the side e-Liquid fill hole located right underneath the drip tip. You don't need to unscrew any parts anymore to refill your e-Liquid due to this convenient design. The Eleaf Melo 2 features a flexible adjustable airflow control valve for great amounts of vapor production. The Eleaf Melo 2 also has an insulated metal drip tip for the best vaping experience possible.