Closeup Toothpaste Icy White Menthol 100ml transfers optical-effect technology developed by Unilever’s laundry team to the field of oral care, using a blue pigment to make yellow teeth appear whiter. This instant-whitening toothpaste is just one example of how our scientists share knowledge across product categories. Its micro-shine crystals remove yellow film for whiter teeth. It also has fluoride for strong teeth.close up tooth paste is the best product for teath whitening ever .