Soap is one of the oldest and most important cosmetic and personal care products. Soap is a product used in conjunction with water for washing and cleaning. It usually comes in a solid molded form (bar soap) but may also come in the form of liquids dispersed from dispensers. Soaps typically contain surfactants that, when applied to a soiled surface in combination with water wet the dirt and effectively holds particles in suspension so it can be rinsed off with clean water.