The present invention provides a unit dose treatment product comprising:

• a) a sealed disposable package comprising a laminate wherein the laminate comprises;
  • i) an aluminium barrier layer; and
  • ii) a polymer contact layer selected from polypropylene, polyamide and nylon 12;
• b) a liquid treatment product contained within the package, wherein the liquid treatment product comprises:
  • i) a film-forming polymer;
  • ii) an organic solvent for the film-forming polymer having a boiling point of less than 150 C. and a solubility parameter of less than 22 (MPa)^0.5; and
  • iii) an active agent;

    wherein the polymer contact layer of the laminate is in contact with the liquid treatment product.

Kits comprising the unit dose treatment products and methods of treating the tissues of the oral cavity employing the unit dose treatment products are also provided. The products, kits and methods herein provide for convenient oral treatments, especially tooth whitening treatments using an extended regimen.