The Ello Pop, the newest member of Eleaf ELLO Series Sub Ohm Tanks, with solid stainless steel structure and ultra sleek design, the beautiful resin wide bore 510 drip tip included. the Eleaf iStick POP with top slide-to-open e-juice refill design and childproof system. vapers only lift up the top cap and slide the top cap to side, the filling hole will reveal, refill your favorite e-juice from the big filling hole without leaking worry. there are four silicone rings on the glass tube, which will prevent the glass tank from being crushed. dual large airflow adjustable slots on base, vapers can rotate the ring to adjust the air flow freely. there are two new replacement coil heads available: HW-N2 and HW-M2, both of them boast the innovative leakage-proof and self-cleaning technology, the new airflow system and porous cotton provide the great vaping experience with better flavour.