A squeezable hermetically sealed vessel contains a whitening compound and an elongated applicator tip extending outwardly from the vessel. A cap closed and seals the applicator tip and the vessel, but may be removed under manual force. Once the cap is removed, the walls of the vessel may be squeezed together to urges the contents of the vessel to flow through a fluid passage through the elongated applicator tip to reach an accommodating surface. The accommodating surface may either be impregnated with a different material that reacts with the contents of the vessel upon contact or covers a chamber that in turn contains such a different material.