Collapsible bottle for photographic chemicals. Heat conductive material keeps chemistry at the correct temperature with the TCS-1000 "Temperature Control System". Opaque plastic designed for storing darkroom chemistries that are sensitive to light and air. 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. Chemicals stored in the bottle last longer when compared to conventional bottles.