Abstract: The present invention relates to oral compositions, systems and methods of applying oral care compositions to the oral cavity. More specifically, oral compositions having optimized characteristics for application and retention on the oral tissues are provided. Furthermore, systems for applying oral compositions to the oral cavity are provided. A method for treating an oral cavity is further provided that enables chronic application of anti-microbial-containing retentive compositions without generating stain on the oral tissues. Furtherstill, peroxide-stable flavour systems are provided.