If you plan to eat the salt from the shaker I would not. As far as I know the plastic is not food safe.
I’m sure this is reasonable as a “better safe than sorry” reasponse,
but, really, if the stuff is thoroughly cured, you could probably
sit down and eat it and it wouldn’t hurt you. And intact, with salt
inside it, it would have to be astonishingly toxic to do anything at
all!
I believe in taking care, but you’re probably more likely to poison
yourself drinking out of a styrofoam cup.
Noel