Provided is a passive
breast milk collector (10) for collecting milk from a mother's breast. The
breast milk collector comprises a container (11). The
breast milk collector is attachable to the breast to enable at least part of the breast to be subjected to an under-pressure created following compression of the container. The container is compressible along a compression axis (CD) to enable the under-pressure to be created. The container is partly delimited by a wall portion (11A), e.g. a
rigid wall portion, that is coupled to a resiliently deformable
assembly (11B; 12, 13, 14, 15). The container is compressible by displacement of the wall portion along the compression axis against a
restoring force of the resiliently deformable
assembly that is deformed during the displacement of the wall portion.