A fluid guiding assembly for a drug delivery device is presented having a first member, a cover part adjacently disposed to the first member and being in non-bonded surface contact with a surface portion of the first member thereby forming an interface area, at least one channel structure extending along the interface area of first member and cover part and being formed by at least one recess in either the first member and/or in the cover part, and a second member being in contact with the cover part and being bonded to the first member by way of injection molding to fix the cover part relative to the first member.
