Fire extinguisher composition and apparatus

A fire extinguisher which comprises a container with an internal volume of about 10 to 30 fluid ounces, said container having a flexible side-wall capable of manual compression, a delivery head attached to the container through a neck region with a construction having a diameter greater than 17 mm, said delivery head having at least 9 orifices with an average diameter of about 0.3 to 2.0 mm, and a dry-chemical fire extinguishant having a particle diameter less than 5 .mu.m partially filling the interior of the container, the remainder of said container comprising air at atmospheric pressure such that shaking the container creates a dispersion of the fire extinguishant in the air within the container, and manual compression of the container side-wall pressurizes the contents of the container to enable the continuous discharge of the fire extinguishant from the container through said orifices for a period of at least about 6 seconds.