Caliburn X Replacement Pods by Uwell are refilled easily from the top with 3mL of e-juice (e-liquid) which is larger than most other Caliburn Pods. Uwell Caliburn X Pods also have interchangeable Caliburn G or G2 Coils so they're not disposable but still beginner-friendly and are designed for mouth-to-lung (MTL) vaping. Caliburn X Pods can only be used with a Uwell Caliburn X Pod Kit,