The present invention relates to a light-protective cover for a container (50 80) accommodating a light-sensitive substance, the cover comprising: a bottom face (16 36 66) with at least one trough opening (14 34 64) to receive a port structure (54 86) of the container (50 80), a sidewall (18 38 68) integrally formed with the bottom face (16 36 66) and being adapted to at least partially enclose the container (50 80), wherein the sidewall (18 38 68) and/or the bottom face (16 36 66) are made of a mechanically stretchable material being substantially opaque for electromagnetic radiation of a predefined spectral range.
