Simply remove the mouthpiece to refill, then snap it back securely. It will not work with other Wenax, Sonder, Hero, Digi, or AQ devices. Pod Styles These pods are available in four resistance levels and two filling styles, designed for both restricted direct-to-lung (RTDL) and mouth-to-lung (MTL) vaping using either nicotine salts or freebase e-liquids.