the packaging is an assembly composed of a substantially rigid outer shell and a inner shell in plastic material contained in this outer shell . the relative dimensions of the outer shell and of the inner shell are such that inner shell can be placed either in a first retracted position in which its base rests on the base of the outer shell and its spout is retracted in the outer shell or in a second extended position in which the inner shell is suspended in the outer shell and its spout goes beyond an opening provided in the cover of the outer shell . the inner shell can be displaced between these two positions according to requirements .