hmmm, no shelf life, I'll be good 4 million years from now just one million years before the sun incinerates us.
If your poor like me I'd go for it, but if you have the cash would it really be worth the risk, especially putting your loved ones on the wheel. Just a thought. I would think a ceramic filter would still be ok, but is thinking going to save you from a pronated whachamacallit.
Good luck with that.
I would call someone and if they say its ok then the odds of the info being correct would be much higher,
just my nickel