In a modular medicament delivery system, a dispenser housing (2) has a support block (42,142) with a well (44,144) and an orifice (46,146) communicating with the well (44,144). A first container assembly (70) includes a valve stem (54) shaped to be received by the well (44,144) in the support block (42,142). The first container (70) assembly has a first exterior shape. A second container assembly (80,84) includes a valve stem (54) shaped to be received by the well (44,144) in the support block (42,142). The second container assembly (80,84) has a second exterior shape that is different than the first exterior shape. An insert member (98,398) is adapted for mounting to the dispenser housing (2) in the cavity and defines an interior space shaped to receive the second exterior shape of the second container (80,84).
