OptimaPod can hold up to 2.0ml of your favorite E-juices or nic salts,there is a convenient side filling with u-shaped airflow system to perfectly prevent leakage, coming with a regular refillable pod adopting FreeCore Mesh Coil to deliver fresh and pure taste, and a RMC (Rebuildable Mesh Coil) pod for DIY fun and cost saving.Also Optima Pod Mod features a compact and slim chassis with intuitive fire button and 0.91 inch OLED display screen.