The Difference Between PP And Tritan Bottles. From the view of performence, PP is usually made of ordinary plastic, but Tritan is a new material, which is far more superior to PP plastic pp bottle is only limited by its own factors the trasparency is not very good as there will always be a hazy sense a fog from the appearance of pp water bottle .But the desity of tritan water bottle is lower than that of pp plastic water bottle .So the tritan bottle look very trasparent just like glass. Tritan bottle perform better than pp bottle Tritan will not be corroded by chemical ,even using various detergent for cleaning and disinfection but pp does not have this performance.