The Uwell Caliburn Koko Prime is another popular pod system vape kit from Uwell, which is an upgraded version of the original Caliburn Koko. It features a similar compact and lightweight design as the Caliburn G, with a slightly smaller battery capacity of 690mAh. The Caliburn Koko Prime comes with a refillable pod that can hold up to 2ml of e-liquid and has a top-fill design. It also includes two different types of pods: a 1.0ohm coil pod for a mouth-to-lung vaping experience and a 0.8ohm coil pod for a direct-to-lung vaping experience.