What do you want for approx one dollar per piece ? shielding from the microwaves so you don't roast your flesh or fry your brain when you accidentally plug it in :-)
To overcome the static condition, place in container of water, if in a sealed tank then just provide water flow (and make sure tank has a pressure relief)
But let's be real . . . at that price they could not even up the voltage sufficiently to generate microwaves, let alone fitting that into the displayed plastic rod (or be allowed to sell such without shielding).
Goes to show you that anyone can claim to heat water with microwaves, ey?