The 1000mL CS Collapsible Air Reduction Accordion Storage Bottle from CineStill Film is a bottle for mixing photographic chemicals. The self contained system offers an opaque plastic design for storing darkroom chemistries that are sensitive to light and air. Chemicals stored in the bottle last longer when compared to conventional bottles. Conveniently, the accordion-like bottle with screw-on cap can be compressed allowing the volume of the bottle to be adapted to match the amount of liquid in it, which reduces the risk of oxidation.