Abstract: A transport package for containing sample tubes and similar materials prone to leakage comprises a rigid, crush resistant tube e.g. wound from cardboard and having an integrally formed super-absorbent lining, the ends of the tube being closed by end caps. The transport package may be placed into a protective envelope comprising a closely fitting pouch for the package and a further pouch for accompanying documentation. Several such packages or packages in envelopes may be placed in a tertiary container comprising a tube forming a main body of the tertiary container. This tube may be divided into two sections, held together by a shrink fit band or outer covering. One end of the tube is formed with a permanent closure and the other end is closable by a lid having an inner rim with a lip that engages between the two sections of the tube.