Smoothmix Blue - Herbal Mixture packHerbal Mixture Blend Tobacco Substitute This Herbal rolling blend is chemical and preservative free. You can use it as a herbal rolling tobacco or mix it in your roll pipe bong as best tobacco substitute. Please note, Smoothmix processed in same facility as nuts, berries, barley, cacao, turmeric, flowers with pollen, if you have any allergy then kindly get it confirmed before use.