Collection container (3) for collecting an object from the ground by passing the object through a resilient grid (10, 11) operable to be forced against the object to thereby, locally change a pre-set mesh-width (W) of the grid (10, 11) by resilient grid deformation generating a passage for penetrating therethrough the object the grid (10, 11) comprising a first grid structure (10) and a second grid structure (11), configured and attached to be repositionable relative to each other such that the mesh-width (W) can be set to at least a maximal (2W) and minimal mesh-width (W) by repositioning at least one of the first (10) and second grid structure (11).
