A container, in particular a urine bottle (10) formed from maceratable sheet material comprises an enclosing wall and an aperture (58). The container is expandable from a first, collapsed configuration into a second, expanded configuration. The sheet material has a plurality of fold lines which define one or more recesses (60, 62) in the enclosing wall of the container in the expanded configuration. In the collapsed condition, the container comprises a lower sheet and an upper sheet lying below a sheet, the upper and lower sheets being sealed together along their lateral edges (34, 36) and along a first, end edge (38) between a first, lower end of the lateral edges (34, 36). The lateral edges (34, 36) taper towards each other and the aperture (58) extends between the second, opposite ends of the lateral edges.