Send it as a voltage regulator.
i wouldn't feel comfortable "lying" about it since in my post office they request a specific description of the package content and a general description like "clothing" or "food aliments" isn't enough.
also i wouldn't want to risk loosing the mods or be accused of false statement if they open the package in the US and see PROVAPE written all over it.
it's kind of absurd since in "country of origin of goods" i would have wrote USA, but any how,the laws changed and might change again.
but I'll still check how much it would cost to send it with a private company since if got it correctly, it only affects USPS.