The Alpine RDTA utilizes their signature top-down airflow system in conjunction with the classic bottom-up. The Alpine RDTA allows the user to easily adjust between concentrated flavor and massive airflow options. Performance is guaranteed with the Alpine's gold-plated two-post deck, titanium screws, and a 3mL tank capacity. The most revolutionary aspect of the Alpine is its center-fill design that enables the user to effortlessly fill the tank by dripping straight down the center post.