An injection device comprises a first sub-assembly. The first sub-assemblycomprises a chamber (116) for holdinga fluid. The chamber comprises an inner surface and an exit aperture (114).The first sub-assembly comprises a stopper (112)movably disposed within the chamber and having an outer surface substantiallyin contact with the inner surface about its perimeter.The first sub-assembly comprises an adapter (118) adapted to transfer fluidinto the chamber.
