The Smok NFIX Replacement Pods, made of PCTG material and can hold 3ml e-juice, the Pods with convenient side e-juice refill design, easy to inject your favorite e-juice without leaking. the NFIX Pods with two symmetrically distributed air inlets on the top that allow more air to enter, the two-way vertical airway brings the direct-to-coil airflow, enhancing the flavor rendering and providing rich vapor production.