A fluid transfer assembly (10) for transporting medicinal substances. The fluid transfer assembly includes flexible tubes (14) and a manifold (12) each comprising silicone. The manifold has an inner protrusion (24) and connector portions having inner walls (28). Free ends of the tubes are inserted into complementary configured inner walls of the connector portions until each of the free ends abut the inner protrusion, which creates a continuous uninterrupted passageway between the inner bores of the tubes through the manifold.