The invention is related to an apparatus comprising an inner body (2000) of a dispense interface and a manifold (2300), wherein the inner body (2000) comprises a recess (2044) configured to receive a distal needle from a distal end (2002) of the inner body (2000), a first fluid reservoir (2050) and a second fluid reservoir (2054), and wherein the manifold (2300) comprises a filling block (2314) configured to redirect flow, a fluid groove arrangement (2318) configured to provide a fluid connection to the filling block (2314), wherein the inner body (2000) and the manifold (2300) are assembled such that there is formed a channel providing a fluid connection from the first fluid reservoir (2050) and the second fluid reservoir (2054), respectively, via the fluid groove arrangement (2318) and the filling block (2314) to the recess (2044). The invention is further related to a drug delivery device comprising an apparatus of the aforementioned kind.
