A blow molded multilayer article with a hollow body defined by a wall with an inner surface and an outer surface. The outer surface has an axial color gradient. The wall has multiple layers and at least one layer optionally contains an effect pigment and/or an opacifying pigment.

A blow molded multilayer article with a hollow body defined by a wall with an inner surface and an outer surface. The outer surface has an axial color gradient. The wall has multiple layers and at least one layer optionally contains an effect pigment and/or an opacifying pigment.

A medical fluid container includes a container interior and a connecting piece that forms an inner channel. The container interior can be accessed from the outside via the connecting piece. The connecting piece has an outer thread on a connecting piece longitudinal section. The inner channel expands in a substantially conical manner in a region of the outer thread, starting from the container interior, to then preferably transition into a first cylindrical channel shape which extends to a free opening of the connecting piece. A method can be used for producing the medical fluid container from a container blank.