A refillable dispenser of fluid material includes a flexible container
having a fluid dispensing portion and a displacement fluid receiving
portion spaced from the fluid dispensing portion. A cap is removably
fastened to the container for closing an opening at the displacement fluid
receiving portion. A cartridge is disposed in the container and contains
fluid material to be dispensed. The cartridge includes an expansible
bladder and may include a collar member connected to the bladder. A
support post may be supported in the container and received by the collar
member. A first flow restrictor allow flow of displacment fluid only from
outside the container into an interior of the bladder. A second flow
restrictor allows flow of material only from within an interior portion of
the container external to the bladder to outside the container. Another
feature is a cartridge for refilling a dispenser of fluid material.