Abstract: Containers for different uses in different kinds of environments, comprising diffusion of volatile matters, traps for pests and protection of contained matters, consist of two half containers, or portions, of different diameter, an upper one (12) and larger in diameter, and a lower one (34) and smaller in diameter, of which the lower one (34) has an upwards oriented mouth and is to be either put on or fastened to the ground or to a support. The lower half container (34) can be provided with means (20) for fastening to the support and between the two half containers (12,34) can be inserted means (36,38) for regulating the spacing between them.