left in a jar thats not opend regularly and kept not in the dark,yes. as far as adding weight u might get a little but your really only gaining back what has dried up.i wouldnt add flavored water.theres sugar in it and i havent seen how that would react with cured pot.so far the only thing i know of that will leave a scent and flavor is oranges and even that will only last a day or 2.my fav is thick papaer towel folded into a small square wetted then rung out,put it in the jar for 3-4 days and take it out.