Uwell Caliburn G Replacement Pods are designed for the Caliburn G Pod System. They're made of PCTG and can hold up to 2ml of your preferred e-liquid. Each pod is refillable via a top fill design system. Refill the pod by removing the mouthpiece portion to expose the fill port. The Caliburn G Pods are compatible with the Caliburn G Replacement Coils which are easily replaceable. Each pack comes with 2 replacement pods.