1. Professional-quality opaque chemical storage bottle. Keeps darkroom chemicals, laboratory solutions, and photosensitive materials fresh by preventing exposure to air and light. 2. Made from chemical-resistant HDPE plastic, ideal for long-term storage of mixed chemicals. HDPE is corrosion-resistant and acid-resistant. 3. Bottles can be compressed to expel air, providing oxidation resistance and moisture protection. 4. Color-coded caps with labels for easy identification and organization of stored items. 5. Compatible with all photographic chemicals, including developers, stop baths, and fixers; also suitable for laboratory solutions and photosensitive materials. Can store solids, powders, and liquids. Maximum capacity: 1 L / 1000 mL. Dimensions: Opening diameter: 3 cm (1.18 in); height (extended): 16 cm (6.3 in); height (compressed): 8 cm (3.15 in); width: 10 cm (3.93 in). Cap colors are assorted and shipped at random; specific color requests cannot be accommodated. Each cap color in a set is unique. Color: Black Material: HDPE Package Contents: 3 × Darkroom chemical storage bottles Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.