The Rpm 5 Replacement XL Pods 3 Pack feature a slide to open top filling system, simply push the top filling cover to expose the filling hole, without pulling out the pod and keeping the complete filling process clean and easy, The Rpm 5 Pods use the RPM 3 coils and are a simple plug and play operation, no unscrewing needed, simply remove the pod from the device, remove the old coil and push the new coil in its place, please ensure that you have lined up the groves on the coil with the notches on the pod to create a perfect seal.