A device for supplying fire suppressing agent to the interior of a container for an extended duration may include a plurality of chambers configured to contain and selectively expel the fire suppressing agent, a puncture mechanism configured to puncture a container, and a manifold in flow communication with the plurality of chambers and the puncture mechanism. The device may further include a controller configured to initiate expulsion of the fire suppressing agent from the chambers in a controlled manner, where the device is configured such that the fire suppressing agent may be first expelled from a first one of the plurality of chambers at a first time, and the fire suppressing agent may be expelled from a second one of the plurality of chambers at a second time that is later than the first time.