Often, these include sodium bicarbonate (aka baking soda), along with sodium chloride, potassium sulfate, and disodium phosphate. The baking soda is what ensures the drink doesn't get too acidic ...

Glycerin, sorbitol, poloxamer 338, PEG-60 hydrogenated castor oil, cellulose gum, cetylpyridinium chloride, copovidone, disodium phosphate, methylparaben ...