This is toothpaste – (Sensodyne ProNamel) It contains water, sorbitol, hydrated silica, glycerin, PEG-8, cocamidopropyl betaine, flavor, titanium dioxide, xantham gum, sodium saccharin, sodium hydroxide, according to the package.  I’m guessing just the silica is showing here, but there might be other particles like the titanium.  Why do they put titanium in toothpaste?  That’s another topic to explore!