The invention features methods and compositions for the treatment of immunonflammatory disorders. The inventive packaging is characterised in that the second and third cavities are provided with a common wall comprising the built-in connection means, and in that said connection means comprise a check valve which can withstand pressure exerted on the side of the second cavity and which opens under the effect of a force exerted on the side of the third cavity. The slit coater includes: a table on which an object to be processed is positioned; a slit nozzle for applying a coating solution onto a surface of the object; and a standby unit into which the slit nozzle is loaded when on standby, and having a shutter at the opening thereof to maintain an inner space in a substantially hermetically sealed solvent atmosphere.