Eco-Conscious Single-Use BOD bottles (300-mL) are lightweight, unbreakable and recyclable. They offer reduced labor, water conservation, as well as convenience. Best of all, using a fresh, clean bottle for each analysis provides more accurate results in your lab.The PET bottles offer a special formulated carbon coating that prevents oxygen from diffusing into or out of your sample. Bottles are individually numbered. Use these bottles straight from the box without pre-cleaning. Bottles are packed in plastic- lined boxes of 100 to eliminate dust or residue that could adversely affect BOD results.