The Falcon Air Evac is a storage container for all liquid black-and-white and color developers. Extends developer life by eliminating destructive air. Made of heavy wall polyethylene, Air Evac is air-proof and durable. As developer is used, compress Air Evac until liquid is level with the top of the container opening and screw the cap on. Air Evac will remain in this position, locking out air until you are ready to use again. When empty, Air Evac can be expanded back to its full quart size to be used over and over again. Plastic-coated, wipe-off label.