I don't understand why you write disposable, the pods can be refilled?! What exactly do you mean by "disposable"? These are not the ready-to-go products of the tobacco industry
Yes, the pods can be refilled. A "disposable" pod is one for which one disposes of the pod & replaces it with a new pod when the coil inside the pod reaches the end of its useful life. A non-disposable pod is one with which one can remove the coil from the pod, replace that coil with another, and continue to use the same pod.
To empty out a filled pod through the small opening is possible but will be bothersome and there will still be liquid residue remaining. Washing the inside of the pod will also be difficult and will saturate the coil with the washing liquid. Tap water will leave particulate residue inside the coil's wick.
You could try to empty the pod and then, as smacuser said, power through the flavor you don't like until it's gone. i suppose that, if you're determined enough, you could try using a syringe to inject distilled water, or maybe unflavored vodka, through the pod's fill hole to wash it out, then let the pod sit with the fill hole opened for several days until the liquid is evaporated entirely. Then hope the coil is still usable. For the price of the pods, it seems to me that it would all be too much trouble, but you may feel differently.
