You show the salt pot ( it's almost filled to the brim and they can see the salt moving around ). Make your hand into a fist and pour the salt in. They can see the salt level lowering. Take it away and there is barely any salt left. You can shake it around and they see the last bit of salt moving around.

Open your hand and...nothing. It's gone. You can end there if you'd like, or vanish the salt pod with a toppit OR make it appear back in the salt pod, magically. They see the salt pot filling back up ( you choose the speed for emptying/filling )

It has to be one of the most realistic illusions in magic. I don't have Gio Livera's Salt & Silver, but if I did, I would use Ethereal Salt. Any size coin can rest on top/underneath and you get the extra kicker of the vanishing/reappearing salt illusion.