Abstract: A container body is formed of a polymer material and contains coloring matter effective to render the body substantially opaque to electromagnetic radiation having a wave length of about 5 to about 600 nm and translucent or semi-transparent to electromagnetic radiation having a wave length of about 600 to about 800 nm. The container permits storage and transport of photosensitive fluids, for example, body fluids for test purposes which contain bilirubin and other photo-degradable substances, but at the same time the contents of the container body are apparent from visual inspection.