You are buying 24 Ounces (by weight) of Oxalic Acid. The item is in THREE 8 Fluid Ounce (by volume) Polypropylene bottles. Oxalic Acid (H2C2O4); also known as Dicarboxylic Acid; has hundreds of uses. CAUTION: Toxic. Acidic. Use gloves to prevent absorption through skin. Bottles are made of sturdy polypropylene. The square, “space-saver” shape ensures that the bottles fit snugly on a shelf. The wide mouth makes for easy dispensing and stackability. To ensure a spill-free journey, the screw tops are heat-sealed and the bottles are sealed in plastic.