A fitment for package holding a liquid and a package including such a fitment. The fitment is a metering dispensing valve arranged to be secured to a flexible bag for selectively dispensing a metered quantity of the liquid therefrom. It includes a compressible bulb and a piercing member which when actuated pierces through the bag to enable a metered amount of the liquid to be drawn into a reservoir in the bulb. The bulb can then be compressed to dispense the metered amount of liquid from the reservoir. The dispensing valve also includes a inlet valve to the reservoir and an outlet valve from the reservoir. The fitment may include a pair of barriers to enable it to be sterilized before being secured to the bag form an aseptic package.