POD:(also called REPLACEMENT POD, EMPTY PODS). are small containers that store e-liquids inOPEN POD SYSTEM- and CLOSEDPOD SYSTEM,replacing spent pods that have been drained of their liquid and no longer produce vapor.
CARTIRDGE: are similar to pods, but instead of containing a disposable liquid tank and small wick drawing liquid to a coil, cartridges are filled with wicking and liquid commingled.
PODS and CARTRIDGES use a simple snap in/out function that’s easy for new vapers to use, and both are designed to be replaced once empty (though open-system pod mods can often be refilled three or four times before they stop working).
POD MODS are disposable and offer only one-time pods that can’t be switched out, but most pod mods have replaceable pods that you can buy separately.